Perry the Platypus

"In your letters, you described your nemesis as a 'suave, semi-aquatic personification of unstoppable dynamic fury'."

- Dr. Gevaarlijk to Heinz Doofenshmirtz, referring to Perry.

"[He is] fierce, cunning, and good with a grappling hook..."

- Heinz Doofenshmirtz, referring to Perry.

"He is a platypus, they don't do much."

- Phineas' reply when people ask what Perry can do.

, code named Agent P, is Phineas and Ferb's pet platypus, who, unbeknownst to his owners, lives a double life as a secret agent for the O.W.C.A. (The Organization Without a Cool Acronym a.k.a. "The Agency"), a government organization of animal spies. In the Agency, his immediate superior is Major Monogram.

Early life
Perry was adopted 5 years ago by the Flynn-Fletcher family (after Bucky got ill and left) from an animal shelter run by the O.W.C.A. The boys chose him because of his wall-eyed gaze that made it appear as though he was looking at both Phineas and Ferb at the same time. When they adopted the platypus, he was given the name "Bartholomew" before he was renamed "Perry" (Phineas and Ferb The Movie: Across the 2nd Dimension). According to Phineas, he has always enjoyed listening to music ("Oh, There You Are, Perry").

Personality
While undercover, Perry can normally be found with his owners, Ferb and Phineas. As their pet, he lives up to the expectations for a platypus and "doesn't do much." He is also serious while on duty as an agent, even in front of Major Monogram when he does anything silly ("Jerk De Soleil", "Boyfriend From 27,000 B.C.", "Traffic Cam Caper", "Skiddley Whiffers").

Perry appears to be selfless and devoid of vanity. In "The Best Lazy Day Ever", it is only after he turns everything else affected by the Ugly-inator back to normal that he reverts himself to his normal state. He deeply cares about the Flynn-Fletcher family and is afraid to lose them. He will take immediate action whenever they are threatened ("Journey to the Center of Candace", "Phineas and Ferb Get Busted!", "Oh, There You Are, Perry", Phineas and Ferb The Movie: Across the 2nd Dimension, "Where's Perry?", "Where's Perry? (Part Two)"). He is nice to not only his allies, but to his nemesis Dr. Doofenshmirtz as well, though only on some occasions ("Oil on Candace", "Thaddeus and Thor", "Brain Drain", "Skiddley Whiffers", "When Worlds Collide", "Road to Danville").

The O.W.C.A.
Perry has a lair under the Flynn-Fletcher’s house that can be entered through various passages. Entrances inclue Chimney-Vator (in which he encounters Santa), one in the side of the tree, another in the side of the house, one in the middle of the backyard, and various others scattered throughout the property and even other parts of the city.

His nemesis is Dr. Heinz Doofenshmirtz. Perry's mission is almost always foiling the doctor’s plans, which he successfully accomplishes almost every time even with minimal details about the plans. Typically, during these missions, his battle with Dr. Doofenshmirtz unintentionally cleans up whatever Phineas and Ferb have been working on that day. For one mission (and only one mission) his nemesis was The Regurgitator, who is now in prison ("Oh, There You Are, Perry").

Perry receives wages from the O.W.C.A. for his work. He is seen paying for Doofenshmirtz’s door (“Lights, Candace, Action!”) and cans of oil (“Traffic Cam Caper”). Major Monogram has mentioned a huge bonus check (“The Lake Nose Monster”). He gives a girl $20 for her skateboard after Dr. Heinz Doofenshmirtz stole a boy’s bike (“Leave the Busting to Us!”). He pays 25 cents for an arcade machine ("Ain't No Kiddie Ride") and he also pays for activate the self-destruction button of one of Doofenshmirtz's schemes in "Operation Crumb Cake"

Abilities and Equipment

 * See also: Agent P's Equipment and Technology.

It is currently unknown how Perry was recruited into the Agency in the first place, nor what kind of training Perry has undergone before receiving missions.

For a platypus, Perry has above-normal strength, speed, stamina, accuracy, and reflexes, (According to Doofenshmirtz, he can perform "highly improbable judo maneuvers") making him a formidable hand-to-hand combatant. A master of platyjitsu ("Learn to Draw Phineas and Ferb"), Perry can subdue his nemesis, Dr. Doofenshmirtz, with ease. Perry is quick-thinking and very efficient in his missions, especially when compared to his temporary partner, the British spy Agent Double 0-0. For example, while Double 0-0 is trying to use his laser-watch to cut through his metal restraints, Perry simply throws a brick at the remote control, pressing the big button and freeing them both ("Elementary My Dear Stacy"). Perry was also able to single-handedly destroy five Norm Bots whereas a group of twelve fellow agents failed to destroy even one despite numerical superiority and an initially successful ambush (Phineas and Ferb The Movie: Across the 2nd Dimension). He has also been shown to respond to and understand not only English, but French as well ("Undercover Carl"), however at one occasion he needed a dictionary ("I Was a Middle Aged Robot").

Perry is familiar with operating most kinds of machinery and vehicles, even if they're Doofenshmirtz's inventions (although perhaps this is due to the fact that most of them have an obvious off-switch, plug or self-destruct button) or Phineas and Ferb's inventions ("Picture This"). With the help of Dr. Doofenshmirtz, he could fix a machine and slightly upgrade it ("Phineas and Ferb Interrupted"). In the live show he was able to wield a lightsaber with extreme skill. He could also build big things such as a making a shelter complete with music and animal servants ("Phineas and Ferb Hawaiian Vacation") and a spinning windmill sculpture while operating a robot (although it might be one of the robot's mechanisms) ("I Was a Middle Aged Robot"). Perry knows math, as he is seen measuring the trap put on by Dr. Doofenshmirtz, as well as making calculations in his head for keeping Heinz out of the way while Vanessa and Monty wished to remain unseen. He is also smart enough to be able to read and write ("I Was a Middle Aged Robot", "Picture This"). Perry also knows how to drive. Some of the vehicles he drives are a hovercraft car ("Ready for the Bettys", "Traffic Cam Caper", "One Good Scare Ought to Do It!"), a banana truck (with aid of stilts so he can reach the pedals) ("Suddenly Suzy"), and Dr. Doofenshmirtz's truck ("Road Trip"). He can also pilot a plane ("One Good Scare Ought to Do It!"). It has been shown that he can parallel park with extreme skill ("The Bully Code").

Perry is musically talented as he can play the guitar ("The Lizard Whisperer", "Last Day of Summer"), the bass guitar ("Phineas and Ferb The Movie: Across the 2nd Dimension", "Skiddley Whiffers"), can DJ ("Brain Drain"), sing opera ("The Doof Side of the Moon"), and read sheet music ("The Lizard Whisperer").

Perry is able to pull a remarkable number of items out of the air from behind his back. Where exactly they are hidden is not obvious because Perry typically does not wear clothes. The most frequent gadgets he uses are:


 * Wrist communicator - Perry wears a watch-like communicator on his front left paw, and one on his front right paw, although it could be the same watch. It is normally hidden by his fur. ("Traffic Cam Caper", "Oh, There You Are, Perry", "Swiss Family Phineas", "No More Bunny Business", "Fireside Girl Jamboree", "Candace Disconnected").


 * Video communicator - Agent P uses a PDA-like, video-chatting device to communicate with his headquarters. Dr. Doofenshmirtz once built a "Monster Truck Locate-inator" that looked the same as Agent P's communicator, just a different color. ("It's a Mud, Mud, Mud, Mud World")


 * Notepad and pencil - Perry uses it to write down notes for his missions but where he has it while not using it is unknown. Perry has also been seen drawing Major Monogram on the notepad while being briefed for a mission.


 * Laptop - Agent P has a teal laptop with a yellow footprint on the cover which he uses to tap into and reprogram the GPS system on the Flynn-Fletcher's rental recreational vehicle ("Road Trip").


 * Fedora - Agent P's fedora serves several purposes. First of all, the hat identifies him as a secret agent. It appears to have a hidden bar-code that allows him to access the computer ("No More Bunny Business"). There is a spring inside the hat that, when pulled, starts a motor which causes the brim of the hat to spin. The hat can then be used as a circular saw ("Gaming the System"). On at least one occasion, Agent P is able to pull an object out of his hat, which he uses to fight Dr. Doofenshmirtz or help himself escape: a can of Fancy Cheese Spray ("I, Brobot") or a hot dog ("Backyard Aquarium"). The hat may also be used like a boomerang. Perry uses his hat in this way to knock Dr. Doofenshmirtz's controller to the ground, damaging it and setting him free ("Voyage to the Bottom of Buford"). In addition, it seems to have unnatural abilities to stay attached to its owner's head; it stays put on Agent P's head underwater and even in space ("Out to Launch"). He seems very attached to it; in circumstances when it is in danger of being blown away, he holds it with one paw on it to keep it in place, and Agent P was furious when Dennis the rogue agent stole his hat and used it to access the Agency's mainframe. Once Dennis is defeated, Agent P snatched his hat back from him indignantly and returned it to its proper place on his own head ("No More Bunny Business"). It also contains an auto-scan replication device inside of it, that scans information during each mission, which the OWCA has been using to recreate each of Heinz Doofenshmirtz's Inator's to be studied and see if they have been getting smarter or dumber as the years go by. The hat was used as a punching glove (Wizard of Odd). Perry also used the auto-scan replication device to scan all of Phineas and Ferb's big ideas that he stored in his lair computer and can be unlocked by placing his tri-fold locket in a slot on his console like a key (Phineas and Ferb The Movie: Across the 2nd Dimension). The most important job his fedora has is to hide his identity from Dr. Doofenshmirtz, without it Dr. Doofenshmirtz can not recognize him (Phineas and Ferb The Movie: Across the 2nd Dimension).


 * Parachute - Agent P, while many times escaping by jumping off something high like a building or a plane, is able to use a parachute with a picture of his face on it, though when he switches bodies with Candace, the image was replaced by a picture of Jeremy ("Does This Duckbill Make Me Look Fat?") . It is unclear where he keeps it.
 * Para-glider - Agent P possesses an orange para-glider with his face on it. He uses it to access places as well as escape from them. Like his parachute, it is still unclear where he keeps it when it's not in use. He also seems to have excellent skill in controlling it. In Transport-inators of Doooom!, when Agent P is not using it looks like a jet pack. When in use in looks like his tie; the game has made some modifications.


 * Grappling gun - Agent P uses it to climb up and swing from buildings and climb onto Doofenshmirtz's blimp. ("Tree to Get Ready", "Run Away Runway", "Bowl-R-Ama Drama")


 * Hoverjet - Agent P's hover jet is platypus-shaped, and is hijacked and mistaken by Phineas to be one of Ferb's inventions ("Ready for the Bettys"). Doofenshmirtz chases Vanessa in it with Perry and Major Monogram.


 * Scooter - Agent P has a white scooter with a green stripe down the middle. ("Flop Starz", "Does This Duckbill Make Me Look Fat?" ).


 * Magnifying Contact Lens - Agent P removes his contact lenses to burn through his trap. ("Monster from the Id")


 * Jetpack - Perry usually uses it get around, usually to or from Doofenshmirtz Evil Inc. The jetpack has the power to smash through glass traps. ("Bullseye!") It also has a turbo mode, which can break a building's roof. ("Road to Danville")

Disguises


"Well, he is a platypus. They don't do much."

- Phineas Flynn

Perry is the Flynn-Fletcher family's only pet that has been mentioned in more than one episode, or rather, every one (others in only a single episode include the deceased Bucky, the freed Goldie, the captured Mr. Cutie Patootie, or Steve who blends into the surroundings). In order to prevent his family and other people from learning his identity, Perry pretends that he is "just a mindless animal that doesn't do much". His primary method to achieve this status is to direct each of his eyes outwards in opposite directions, creating the "dumb" look. Once he is certain that he is no longer being watched, Perry drops the act and retrieves his secret agent hat, a fedora. During his mission as "Perry the Teenage Girl", Perry continued to use this method to mask his true intelligence.

Perry has become adept in switching between his two disguises and can perform the switch in rapid succession ("Traffic Cam Caper", "The Chronicles of Meap", "No More Bunny Business", "Picture This", "Swiss Family Phineas").

Despite frequent contact with Perry, Dr. Doofenshmirtz does not recognize his enemy unless Perry is wearing his hat. If Perry enters Doofenshmirtz's building without wearing the hat, the doctor will act surprised and exclaim "A platypus?". However, once Doofenshmirtz has seen Agent P wearing the fedora, if it is removed, Doofenshmirtz is still able to recognize him, although sometimes he can still get confused ("Get That Bigfoot Outa My Face!", "Oil on Candace", "I Scream, You Scream", "It's About Time!", "Attack of the 50 Foot Sister ", "Phineas and Ferb The Movie: Across the 2nd Dimension", "The Remains of the Platypus", "Primal Perry"). Doofenshmirtz has also built an inator that can not identify him without his hat on ("Ladies and Gentlemen, Meet Max Modem!").

Perry's most successful disguise might be that of when he and Candace accidentally switch bodies. ("Does This Duckbill Make Me Look Fat?") When Perry (in Candace's body) first enters his lair to receive his mission briefing, Major Monogram thinks that there has been a breach of security. Once the hat falls on Perry's head, Major Monogram identifies him as "Agent P" and praises Perry for the "brilliant disguise", while Carl is disappointed to learn that it is not a real girl. Likewise, when Perry breaks in to Doofenshmirtz's building, the doctor exclaims "A teenage girl?". After Perry puts on the fedora, Dr. Doofenshmirtz shrieks, "Perry the Teenage Girl?". While all the Agents wear similar hats, it is this particular hat that allows people to identify Perry as Agent P, as shown when Dennis wears Perry's hat and a scanner is shown, scanning an apparent bar-code like structure to hack into the O.W.C.A. as Perry ("No More Bunny Business").

Agent P has used the "Groucho glasses" to narrowly avoid being recognized by Linda Flynn-Fletcher in the street ("Flop Starz"), disguised himself as Dr. Lloyd Wexler ("A Hard Day's Knight"), and disguised himself as Ferb and Norm ("Traffic Cam Caper"). Inside the Superduper Mega Superstore, when Perry wears a Hawaiian shirt, sunglasses and a bowler hat, none of his acquaintances at the mall are able to recognize him ("Vanessassary Roughness").

Major Monogram makes him come into his lair as a magpie for a joke. Carl and Major Monogram laugh and then ask him to do it as a bunny rabbit but Perry seems very annoyed ("Boyfriend From 27,000 B.C.").

Once when a rouge agent named Dennis the Rabbit tried to hack the O.W.C.A,Perry had to stop him and avoid his cover being blown. This shows that he is very quick with disguises, especially his pet mode. (No More Bunny Business)

Failures
Though Perry usually succeeds on almost all of his battles against Doofenshmirtz, there were a few times when he actually failed to stop Doofenshmirtz in his schemes.
 * He attempted to stop Doofenshmirtz from blowing his old mentor's hideout with his Disinitivaporator (though it is unclear of why he wanted to stop him). Though Perry manages to foil this by bringing in the ticking Disinitivaporator onto Doof's ship, Doof manages to escape by throwing both Perry and the Disinitivaporator off the plane before making a clean escape, and Perry is forced to let him go as a result while the Disinitivaporator destroys Phineas's haunted house. ("One Good Scare Ought to Do It!")
 * In a flashback, Perry once attempted to engage into a fight with Doofenshmirtz on a rooftop, but Doofenshmirtz manages to use an umbrella to make Perry lose his footing, causing him to fall into a sandpaper factory and allowing Doofenshmirtz to escape victoriously. This also forces Perry to wear a pet cone, which prevented him to go on his next mission, leaving him very upset. ("Hail Doofania!")
 * During one afternoon, Perry learns of Doofenshmirtz's latest scheme to move the local lighthouse away to the other side of town so that Doofenshmirtz can get some good night's sleep. Though Doofenshmirtz manages to activate the rockets attached to the bottom of the lighthouse to move it, he realized that he had forgot to put some steering mechanism into it, which would result the lighthouse crashing into Doof's building in the end. Deciding that fighting against Perry isn't worth it, Doofenshmirtz angrily tells Perry to go home, saying that the lighthouse is gone and that there's nothing that Perry can do about it but to tell Major Monogram that he lost this one. Surprised to see that Doof actually makes a good point, Perry walks away in defeat. ("That Sinking Feeling")
 * Upon hearing that Doofenshmirtz is roaming around looking for an on-and-off switch, Perry barges into his lair, only to be trapped in a lobster cage. After finding the right switch, Doofenshmirtz didn't realize that the switch only opens and closes the cage until too late when he sees that Perry has escaped from it after it opened. At first, Perry engages into a fight, but Doofenshmirtz points out that it would be just stupid to fight him over activating a lobster cage (since it's not considered evil) and taunts Perry for fighting him over such a silly issue. Seeing that Doofenshmirtz is right, an unhappy Perry concedes defeat again by giving a thumbs up to Doof and leaves. ("Finding Mary McGuffin")
 * Upon learning of Doofenshmirtz's attempt to ruin Roger's art veiling (because of a back-story when Roger accidentally ruined Doofenshmirtz's greatest masterpiece during college), Perry attempts to stop Doofenshmirtz, but fails as Doofenshmirtz sets his -inator to autofire. However, Doofenshmirtz soon realizes that Roger had spent 20 years restoring his masterpiece and intends to present it out to make amends, but is too late to stop the inator from ruining the painting, much to both Doofenshmirtz and Roger's dismay. Taking no regard in this, Perry sabotages Doof's hovercraft and flies off. ("Magic Carpet Ride")
 * Upon learning of Doofenshmirtz's attempt to build an -inator that involves traveling to alternate dimensions, Perry attempts to stop him, only to find out in horror that Phineas and Ferb have arrived in Doof's lair (thanks to Perry's hovercraft colliding with their giant shuttlecock that caused them to fly to Doof's lair in the first place) and are now helping him making several modifications to the machine. As such, a nervous Perry is now forced to watch in pet mode as Doofenshmirtz finally activates his machine, as it successfully opens a portal to the 2nd Dimension, much to Perry's dismay. ( Phineas and Ferb The Movie: Across the 2nd Dimension")
 * Doofenshmirtz has invented an -inator that steals all of the keys of Danville until he gets the Key to the City. Though Perry manages to return all keys back to their owners, he failed to stop Doofenshmirtz from getting the Key to the City. ("Cranius Maximus")
 * Doofenshmirtz has invented the Der Kinderlumper-inator, which will turn him into a creature called Der Kinderlumper (which is considered as ghoulish creature according to Druselstinian folktale), so that he can scare Roger and take over the Tri-State Area. Doof manages to fire it up, turning himself and Perry into Kinderlumpers before trapping the latter in a cage. Though Perry failed to stop Doofenshmirtz from appearing to Roger as he was unable to escape from the cage, it turns out that Roger isn't afraid of Der Kinderlumper (as he was told by his mother that it was a gift-loving creature), much to Doof's dismay. ("Der Kinderlumper")
 * Doofenshmirtz has created a 90-Degree-Turn-Inator in order to humiliate Roger in front of the visiting Mayor of Stumblegimp, so that Roger will be forced to perform the Humiliating Dance of Contrition to make amends. Though Perry fails to stop Doofenshmirtz from striking Roger with the -inator, Roger manages to make amends by performing a modern version of the Humiliating Dance of Contrition, something which Doof didn't expect. ("One Good Turn")
 * Upon learning about Doofenshmirtz's latest scheme to move the Earth away from the Sun to an early autumn, Perry engages into a fight with him, but accidentally fires up the -inator after being shoved by Doof, causing the Earth to move away as planned. Despite beating up Doof with a mop, Perry was too late to foil his scheme and goes back to O.W.C.A. HQ in shame, being very unhappy that he miserably failed to stop Doof from succeeding in a grand evil scheme. This was also the first time Doof may have succeeded in taking over the Tri-State Area that Perry failed to stop, as the change in weather caused civil unrest in City Hall, which forced a nervous Roger to evade from the angry citizens and allowed Doofenshmirtz and his fellow members of L.O.V.E.M.U.F.F.I.N. to take over City Hall, much to Perry's dismay. ("Phineas and Ferb Save Summer")
 * During the Tristies Awards Show, Perry learns of Doofenshmirtz's attempt to turn Roger into a warthog with an elixir so that he can be removed from power. He attempted to stop Doof from spraying the elixir, but ends up taking the shot, becoming a warthog. The musical band Swine Flute spot a tambourine on his tail and forced him to perform with them, much to Perry's dismay. This allowed Doof to set his elixir to set off on Roger's podium during the ending of the show, though this was foiled when Mittington Random ends up taking the shot. Doof then attempts to curse Perry again for his failure, but decides to forget about it since Perry was too busy helping out with Swine Flute. ("The Klimpaloon Ultimatum")
 * During the unveiling of Danville's first water tower, Perry learns that Doofenshmirtz's planning to turn Roger into a repulsive being with his Repulse-inator. Though Perry best him out on a pillow fight, Doofenshmirtz manages to fire up his -inator, which successfully strikes Roger, who then turns into a zombie version of Doofenshmirtz. This causes an unwanted epidemic in which anyone who gets touched by a Doof zombie becomes one, something which both Doof and Perry didn't expect. ("Night of the Living Pharmacists")
 * Upon hearing that Doofenshmirtz is building a Governor's Mansion on top of City Hall with his Tri-Governor-inator so that he can run for Tri-Governor, Perry heads off to stop him. However, a series of time loops (caused by Doofenshmirtz's Do-Over-Inator after it was activated by a visiting Candace) allowed Doofenshmirtz to anticipate Perry's moves and defeat him in a series of traps. Doof then proceeds with his scheme, which finally became a success. As the new Tri-Governor, Doofenshmirtz puts up a legislation against O.W.C.A. to prevent them from foiling any more of his schemes until the end of his term. Realizing that he can no longer thwart Doof as long as he remains Tri-Governor, Perry becomes very depressed and concedes defeat. This is the second time that Perry failed to stop Doof from taking over the Tri-State Area. However, Doof soon learns that the time loops are causing rifts which may threaten the time-space continium, so he decides to abandon his evil ways and Perry helps him out in creating another -inator to fix the time flow. ("Last Day of Summer")

Major Monogram.
Perry's superior is the leader of his division of the O.W.C.A., Major Monogram. Monogram himself gives a mission briefing nearly every episode to Agent P. When Perry is receiving his mission in his lair, he writes down notes, assumed as something which would help him during his mission. However, sometimes, he just draws his boss ("S'Winter"). Perry always does as he says, never failing battling Doofenshmirtz or failing in general (though there are a few exceptions, such as "Phineas and Ferb's Quantum Boogaloo", which takes place in an alternate timeline; "That Sinking Feeling", where Perry loses but Doofenshmirtz's plan fail anyway; and in "Phineas and Ferb: Across the 2nd Dimension", "Phineas and Ferb Save Summer", and "Last Day of Summer", where Doofenshmirtz actually succeeds on his grand evil schemes that Perry miserably failed to stop, but at the end, Doofenshmirtz regrets).

The Flynn-Fletcher family
Perry's affection for his family is most obvious and very indicative when he had a nightmare that his 'animal side' cover was blown and he is forced to lose the Flynn-Fletcher family and get a replacement. When Perry woke up from the nightmare, Phineas reassures him that it was just "a bad dream", causing Perry to smile and go back to sleep ("Phineas and Ferb Get Busted!"). Perry's feelings for his owners are further showcased when he is faced with the prospects of moving to a new family in order to combat another evil scientist: he appears visibly shaken and sad. In the song Come Home Perry, Phineas mentions that Perry is the color of a blueberry and is "kinda short and hairy." It is shown that Perry spends part of the night sleeping in Phineas's bed and at some point switches over to Ferb's so as to not show preference or play favorites with any one of them ("Oh, There You Are, Perry"). Also, he sometimes appears in the mornings on Candace's bed, even though it annoys her to no end. This may be because he's trying to give Candace a turn as well.

Phineas Flynn and Ferb Fletcher


To maintain his cover, Perry adopts the disguise of a "mindless animal" around people. During one of his missions ("Journey to the Center of Candace"), when Perry realizes Doofenshmirtz's plans will directly affect Phineas and Ferb, Perry takes decisive action to stop him immediately instead of following the spy routine (being trapped and then escaping) as usual. Perry's reaction indicates that he cares for the well-being and safety of the boys. The reason for this action may be that the boys provide Perry with more than just a cover, but also with affection. On another occasion ("Ready for the Bettys"), he follows the boys to guard them when they go on their own "mission" (however, he may have done so strictly on Major Monogram's orders). Perry has even allowed Phineas and Ferb to dress him in an extremely humiliating costume for their circus show and averts his mission temporarily to appear in his act ("Jerk De Soleil").



The only noticeable occasion where Perry has expressed anything less than affection for Phineas and Ferb was when they came back from their "mission" in his hovercraft. He caught the hovercraft in a tractor beam and turned it upside down, dumping the boys into Isabella's pool ("Ready for the Bettys").

One of Perry's biggest instants of showing affection towards Phineas and Ferb was when they were pulled into another dimension with Doofenshmirtz. Perry exposes his true identity to the boys when the alternate Doofenshmirtz orders Perry the Platyborg to attack the boys, indicating that Perry is beloved family pet first, and secret agent second. Despite his cover being exposed and a one-sided argument with Phineas, he allows Phineas and Ferb to fight by his side when they are attacked by the other dimension Doofenshmirtz and trusts Phineas enough to be able to willingly plunge themselves to doom so Phineas could open another portal to another dimension. Towards the end, after the battle ends and everyone's memories are wiped, Perry uploads pictures he took of him and his owners and saves them to his lair computer with an emotional smile, glad to have shared such an adventure with them (Phineas and Ferb The Movie: Across the 2nd Dimension).

Perry is well aware of Phineas and Ferb's Big Ideas, and has suspected that they may one day be useful if there is ever a danger to the Tri-State Area that even he or the O.W.C.A could not handle, Perry used the same technology used to replicate Doofenshmirtz's Inator on hand to recreate the Big Ideas if Phineas and Ferb enter his lair and insert a key given to them by him. this indicates that Perry always trust Phineas and Ferb to help him if he needs it (Phineas and Ferb The Movie: Across the 2nd Dimension).

Phineas and Ferb have several projects featuring their pet platypus: an "inaction figure", a restaurant, a circus show, an animal language translator, a machine to nurture what is thought to be Perry's egg, the Platypult, and the Perrytronic 3000.

Candace Flynn
While Perry does not exhibit any different behavior around Candace than he does around other people, he does tend to show up beside her in unexpected and sometimes unwanted places. ("Day of the Living Gelatin") He seems to especially like her bed. Candace is easily annoyed by Perry's odor, or perhaps his sheer presence, as she repeatedly berates her brothers for letting Perry wander into her room (and later switched brains with her, thanks to Phineas and Ferb's invention ("Does This Duckbill Make Me Look Fat?"). Perry has interrupted Candace's dream at least once by making his characteristic chirping noise on her bed ("Candace Loses Her Head").

However, there are instances when Candace appears to be more friendly to Perry ("Traffic Cam Caper", "Mom's Birthday"). Candace was once overwhelmed by feelings of guilt when Perry goes missing, as she had angrily put Perry outside the house after tripping on him the night before, meaning that she truly cares about him. He then started moving his hand mockingly copying what Candace had said, in a rare instance of Perry's reaction towards Candace ("Oh, There You Are, Perry").

Nevertheless, Perry saves a hallucinating Candace from being blown up in Doofenshmirtz's new secret base ("The Ballad of Badbeard") and brings her back to Danville when she is stranded in Easter Island ("Candace Disconnected"). Perry also saves Candace from Doofenshmirtz's Evil Witch Castle in her dream ("Wizard of Odd").

On some occasions Candace sees Perry as Agent P, but later thinks that she is just seeing things and ignores it ("The Ballad of Badbeard", "Wizard of Odd"), with the obvious exception of her trip to the 2nd Dimension (Phineas and Ferb The Movie: Across the 2nd Dimension).

Dr. Doofenshmirtz
The Drusselsteinian mad scientist Heinz Doofenshmirtz first met his nemesis, Perry, on the day he had his portrait taken. Perry had been spying on the mad scientist from across the street ("It's About Time!").Agent P's job is to stop whatever evil scheme of Dr. Doofenshmirtz. Agent P always finishes his job nicely, leaving the doctor screaming "Curse you, Perry the Platypus!". It is unclear how Dr. Doofenshmirtz knows his platypus nemesis's pet name, "Perry". The doctor usually calls Perry "Perry the Platypus", rarely "Perry" and never "Agent P". The only times he has called Agent P "Perry" is when Doofenshmirtz tried to make a mountain out of a mole hill ("At the Car Wash") ("Oh, sorry, Perry, I didn't mean to get all street there!"), when he tried to find Perry's address ("Hide and Seek") ("Oh, it will be so delicious to know where Perry lives!", "Good, we're back on the Perry Show."), and when he tried to shoot an ice cream van with his Re-tire-inator ("The Bully Code") ("Oh, Perry the Platypus, have you come to sign my cast? Look, I saved you a spot right there, it says "Save for Perry").

Over time, they have become each other's frenemy. In some cases, after confronting Dr. Doofenshmirtz and evaluating the situation, Perry decides to help Dr. Doofenshmirtz with his not-so-evil plans. Notable examples include setting up a birthday party for the doctor's daughter ("Dude, We're Getting the Band Back Together") and pretending to be the doctor's pet ("Get That Bigfoot Outa My Face!"). Perry has agreed to help Doofenshmirtz go shopping ("Unfair Science Fair Redux (Another Story)"), wait patiently until the doctor finishes his creation ("I Scream, You Scream") and let the doctor control the giant dragon robot while Perry himself controls the Queen Elizabeth robot which the doctor deems not evil enough for him ("A Hard Day's Knight"). At one point, the doctor gave Perry a key to his apartment because he felt it was "more civilized than crashing through his ceiling" ("I, Brobot"). Dr.Doofenshmirtz even shared some of his chicken wings with Perry ("The Lake Nose Monster"). Also, Perry seemed to feel guilty and paid for a door he broke while busting in to Doofenshmirtz's lair ("Lights, Candace, Action!"). Perry also once joined Doofenshmirtz in his "evil" exercise show and even enjoyed it ("Candace Disconnected").

When Dr. Doofenshmirtz fails to impress his former Evil 101 teacher, Dr. Gevaarlijk, Perry offers him a smile of encouragement when the doctor asks if Perry thinks he is evil ("Oil on Candace"). However, when Doofenshmirtz's scheme isn't evil enough he asks Perry to "thwart his plan". Perry plays along after Doofenshmirtz starts becoming annoying. ("Perry Lays an Egg").

When it appears that Dr. Doofenshmirtz has turned good (he saves a cat), Agent P brings him the Standard Welcome Package ("Voyage to the Bottom of Buford").

The relationship has evolved to the point that when Dr. Doofenshmirtz replaces Perry with Peter the Panda as his nemesis, Perry is heartbroken and intends to quit his job at the Agency. Eventually Doofenshmirtz starts to miss Perry as Peter is disassembling his freezanator ray while he's singing about his feelings ("It's About Time!"). Similarly, Doofenshmirtz reacts negatively when Perry is assigned to fight another mad scientist, The Regurgitator. Doofenshmirtz has gone as far as saving Perry from being destroyed by the Regurgitator, stating that Perry can be only his nemesis ("Oh, There You Are, Perry").

Perry always saves Doofenshmirtz from death, one example is when Doofenshmirtz made the Termite-Controlling Helmet. Later when Doofenshmirtz's fortress was going to explode, but Perry dived in and saved him ("The Magnificent Few"). Doofenshmirtz doesn't usually return the favor, as Perry is never near death. Another example of this was when Doofenshmirtz tries to save Mr. Fluffypants resulting in him falling off the building Perry dives after him stopping him and Mr. Fluffypants before they fall to the ground ("Spa Day").

At one point, Doofenshmirtz referred to Perry as a good listener and his best friend ("The Chronicles of Meap"). Perry has also helped Doofenshmirtz practice kickball and comforted him when he failed ("Thaddeus and Thor"). Doofenshmirtz had once held Perry and TV producerJeff McGarland hostage and pitched them the idea of a series called Doof 'n' Puss, starring himself and Perry with hopes that he would become so famous that his fans would want to do his bidding. McGarland rejects the idea, and then eventually changes his mind, but suggests that the platypus needs to have a girlfriend. Perry smirks when Doofenshmirtz is offended by the suggestion, and Heinz refuses to carry on with the deal. Later, he watches a TV series produced by McGarland using his idea, but called The Platypus and His Girlfriend starring a fake Perry and a woman, and was receiving terrific ratings ("Nerds of a Feather").

Jeremy Johnson
Perry doesn't interact with Jeremy that much, but he seems to know him well; on the occasions that Jeremy visits The Flynn-Fletcher household (or whenever he sees Perry), he is always very friendly towards Perry ("Does This Duckbill Make Me Look Fat?", 'Misperceived Monotreme").

When Jeremy gave Doofenshmirtz a guitar lesson, Perry was forced to hide until Jeremy left so his cover wouldn't be blown ("The Lizard Whisperer").

Pinky the Chihuahua
Pinky the Chihuahua and Perry the Platypus are allies, as they are in the same agency, though in different divisions. Once Perry went to Pinky's lair by mistake since he entered by going inside one of Isabella's plants ("Day of the Living Gelatin"). They encountered each other when using the same elevator and they both tilted their hats to show respect to one another ("Bubble Boys," "Isabella and the Temple of Sap"). Pinky laughs at Perry when Perry is wearing a Bee Costume. (Bee Story) They have also fought alongside eachother on occasions.(Phineas and Ferb The Movie: Across the 2nd Dimension, Where's Pinky?).

Vanessa Doofenshmirtz
Perry the Platypus has encountered Dr.D's daughter several times due to his daily battles with her father, Heinz Doofenshmirtz. Despite her being the daughter of his nemesis, and her having helped out with her father's traps and schemes on occasion ("The Magnificent Few", "Tree to Get Ready"), the two get along very well.

Stacy Hirano
In "Happy Birthday, Isabella", Stacy witnesses Perry and Doofenshmirtz in battle and learns that Perry is a secret agent. Perry shows her the O.W.C.A. pamphlet which informs her that if an agent's host family learns of their pet's dual identity, they must have their memory erased, or else the pet be relocated to a new host family. However, Stacy convinces Perry to let her keep her memory on the technicality that she is not a member of the Flynn-Fletcher family. They agree to keep her knowledge of him as an agent secret from the O.W.C.A. and the Flynn-Fletchers.

Aloyse von Roddenstein
Perry is shown to be enemies with Doofenshmirtz's rival Aloyse von Roddenstein (or Rodney for short), due to Perry's reputation of being a well-known agent of the O.W.C.A. and Rodney's reputation being a more evil scientist than Doofenshmirtz. Unlike Doofenshmirtz, who seems to hold a complicated relationship with Perry, Rodney's conflict towards Perry is that of pure emnity. At one time, Perry defeats Rodney by sending a giant disco ball to fall on him and Doofenshmirtz, sending them (and the other villains) to the hospital. ("Nerdy Dancin'") Perry even helped Doofenshmirtz to get into the L.O.V.E.M.U.F.F.I.N. Summer Stock Festival Play by having themselves to storm into the stage, knocking Rodney off the stage since he was trying to steal Doofenshmirtz's role in the play. ("Road to Danville")

When Rodney used Doofenshmirtz's blueprints to build his -inizor that will send the entire Earth into a new Ice Age, Perry and Doofenshmirtz worked together with Major Monogram, Carl, and Monty to defeat him. ("Phineas and Ferb: Save Summer")

Background Information
.
 * Perry has his own theme song.
 * There's an extended version of Perry's theme song on the Phineas and Ferb: Across the 1st and 2nd Dimensions Soundtrack.
 * Phineas and Ferb named him "Bartholomew" at first, but changed it later to Perry. (Phineas and Ferb The Movie: Across the 2nd Dimension)
 * Perry has a badge that he carries with him. It has the word "Spy" and an image of Perry peeking over a fence ("I, Brobot").
 * When Perry has a day off, he usually watches romantic soap operas and eats potato chips ("Oil on Candace").
 * While Perry usually makes chattering sounds only, there have been occasions where he makes other sounds: a weary sound when he has to walk back up the same flight of stairs ("Got Game?"), releasing a breath of relief ("Candace's Big Day"), sighing and sneezing ("Hail Doofania!"), smacking lips ("Moon Farm"), nervous shuttering ("The Doonkelberry Imperative"), and laughing ("Elementary My Dear Stacy"). His analog in the Victorian age, the Platypus monster made growling and moaning sounds ("The Monster of Phineas-n-Ferbenstein"). He also imitated Candace one night after she forced him out of the house (the reason for this involved a glass of water and Candace tripping) ("Oh, There You Are, Perry"). Although it should be noted that most of these are pretty much variations of his usual chattering.
 * Perry has an e-mail account where he receives messages from Major Monogram. ("Hail Doofania!")
 * Perry is usually seen with indignant and serious expressions on his face, and doesn't seem to smile so much. However, there are some instances where he is seen smiling.
 * Perry uses a litter-box, much like a house-cat ("Phineas and Ferb Hawaiian Vacation", Phineas and Ferb The Movie: Across the 2nd Dimension).
 * Perry is most likely ambidextrous (not left or right handed) because he is seen writing with his left hand ("S'Winter") and with his right ("The Magnificent Few").
 * Ferb occasionally mentions that platypus are the only mammals to lay eggs. In truth, all monotremes (such as echidnas) lay eggs, so Ferb's statement is incorrect. Phineas once states that one day Perry might lay an egg—a strange thought, as Perry is male ("Rollercoaster", "Perry Lays an Egg").
 * A marketing executive incorrectly believed that Perry is a marsupial ("Toy to the World"). Baljeet correctly identified Perry as a monotreme later that summer ("Swiss Family Phineas").
 * Phineas can tell the difference between Perry and all the platypuses in Danville (there are quite a lot, oddly enough), though they seem to look exactly the same. Phineas was even able to tell if the others were just slightly more bluer than Perry or even smelled different ("Oh, There You Are, Perry")
 * Candace, while trapped in Perry's body, is shown "sweating milk". Only female platypus have mammary glands and Perry is obviously a male, so Candace's body should not have been affected in this way. Then again, Candace is a female ("Does This Duckbill Make Me Look Fat?").
 * He was once addressed as Mr. Platypus and described as a deformed, tiny, turquoise man by Dr. Doofenshmirtz. ("Doof 101")
 * Perry consumed an entire cheese wheel made by Dr. Doofenshmirtz. The cheese wheel was much larger than Perry, giving him a comically large, cheese wheel-shaped bulge around his stomach after he ate it. ("Lights, Candace, Action!").
 * Perry has been shown twice in his possible future. When hit by the Age-Accelerator-inator, he is seen much older and wrinkly with a cane ("Lights, Candace, Action!"). Perry, 20 years later in the story line, is shown walking with a walker but still old and wrinkly ("Phineas and Ferb's Quantum Boogaloo").
 * Dr. Doofenshmirtz owns a mint green pair of boxers with Perry's face in agent form, though Doofenshmirtz claims he had them a long time before he met Perry ("Bubble Boys").
 * Perry wears boxer shorts under his fur ("Unfair Science Fair", "Perry Lays an Egg") which means that the line "Besides his hat he wears no clothes", in the song "My Nemesis", is incorrect. He has also been shot by Doofenshmirtz's Underwear-inator ("Monster from the Id").
 * Perry has been known to break the Fourth wall for looking at the audience. ("Flop Starz", "Got Game?", "Backyard Aquarium", "A Real Boy", "Road Trip")
 * Major Monogram calls Perry Agent P, but there are a few other agents who could be called Agent P, including: Pinky the Chihuahua ("Day of the Living Gelatin", "Isabella and the Temple of Sap", "Bee Story", "Where's Pinky?"), Peter the Panda ("It's About Time!", Meapless in Seattle", "Sidetracked") and Planty the Potted Plant ("No More Bunny Business") The unnamed pig and porcupine agent ("Cheer Up Candace")
 * Phineas and Ferb have seen Perry as Agent P four times, and twice in a dream. The first time they thought he was a toy-design for Perry the secret agent Platypus ("Toy to the World") and the second that he was part of a video game ("Brain Drain"). Phineas and Ferb also see Perry as an agent when the captain of Smile Away Reformatory School tries to get Phineas and Ferb. Dr. Doofenshmirtz and Perry interrupts them, but it was just a dream ("Phineas and Ferb Get Busted!"). When Candace dreamed that she was in Odd, Phineas and Ferb saw Perry as an agent when the popped up trying to take Candace off the Yellow Sidewalk. However, Phineas and Ferb didn't pay much attention to him. Phineas and Ferb have also seen him as a secret agent when they travel to the 2nd Dimension, but they willingly have their memories erased later in order to keep him (Phineas and Ferb The Movie: Across the 2nd Dimension). The fifth time Perry battled alongside the Avengers, Spiderman, Hulk-Jeet (Baljeet), The Beak (Phineas and Ferb) and Bear-boy (Buford) to save the Tri-State Area, although he dressed up as 'Super Perry' so that his Host Family wouldn't recognize him. However Phineas did start to think that Perry looked familiar.
 * Perry probably enjoys Christmas because he smiles whenever a Christmas character appears ("I, Brobot", "Phineas and Ferb Christmas Vacation!").
 * Perry knows how to play cards and has done so at a casino ("Undercover Carl").
 * He knows how to play the guitar and the bass guitar ("The Lizard Whisperer", "Phineas and Ferb The Movie: Across the 2nd Dimension", "Skiddley Whiffers", "Last Day of Summer").
 * He has two other nicknames: "P to the P" and "P Square", both of which symbolizing the numerous Ps in his name ("Phineas and Ferb Musical Cliptastic Countdown").
 * Perry's DNA code is 74218390 ("Just Passing Through").
 * Perry doesn't like to wear dresses ("No More Bunny Business", "Gaming the System").
 * Perry may like hot wings since Doofenshmirtz shares them with him ("The Lake Nose Monster").
 * Perry could DJ, and taught the skills to Heinz Doofenshmirtz via controlling machine ("Brain Drain").
 * Perry has been seen on camera a few times, including in ("It's About Time!") when he was being counseled on TV after Doofenshmirtz replaced him with Peter the Panda as his nemesis. He was seen again on a talk show when he was searching for fellow Secret Agent G ("Undercover Carl"). He was taped entering his lair from the traffic camera across the street ("Traffic Cam Caper"). Doofenshmirtz created a TV series featuring Perry and himself as the main stars in Doof 'n' Puss ("Nerds of a Feather"). Doofenshmirtz hosted the Telethon of Evil and tied Perry up beside him ("The Secret of Success").
 * Perry has a watch on his right arm ("Fireside Girl Jamboree", "Phineas and Ferb-Busters!") and one on his left arm, ("Oh, There You Are, Perry") but it could just be the same watch, and he put it on the other arm. However, he has been seen with a watch on both arms. ("Phineas and Ferb: Mission Marvel")
 * Perry is capable of singing opera in a very high-pitched tone (though it's not audible when he does it) ("The Doof Side of the Moon").
 * Perry wears contact lenses. Since the contact lenses are convex as it can concentrate light, that would mean he is farsighted. ("Monster from the Id")
 * The spelling of the chattering noise he makes is given as "Gyururururururu", which appears to be a Japanese onomatopoeia, in the video games "Phineas and Ferb", "Phineas and Ferb Ride Again". In comics published in the Phineas and Ferb magazine, it is spelled as "brbrbrbrbrbr."
 * Perry appears to be highly proficient at double dutch. ("When Worlds Collide")
 * Perry is O.W.C.A.'s top agent and, for some reason, is assigned to its least credible threat. (Agent P's Guide to Fighting Evil)
 * He enjoys horseback riding, good books, and long walks on the beach. Perry's also an excellent pachisi player. (Agent P's Guide to Fighting Evil)
 * Dan and Jeff wanted Perry to be an animal that cannot be bought from a pet shop or pound, because if it were a species as common as a dog, kid viewers would want their parents to buy the same breed of dog, etc. They wanted an unknown animal so that they may have creative freedom with it (Jeff's mother-in-law thought that he had actually invented the animal). Before making him a platypus, they considered making Perry a capybara.
 * It would be practically impossible to have a platypus as a pet because male platypuses are actually venomous.
 * Perry does have venom spurs on his ankles ("Primal Perry"). He is apparently careful when he kicks Doofenshmirtz, because his nemesis didn't even know that he had them.
 * Perry is the only character that appears in every episode of the series.
 * In most foreign language dubs, Perry's chattering sound is deeper.
 * In some early drawings unlike regular platypuses, Perry had black eyes, but was changed to dark red eyes to be more like normal platypuses.
 * Perry makes a cameo appearance alongside Swampy the alligator in the trailer for the latest "Where's My Water?" incarnation, "Where's My Mickey?".
 * A semi-recurring gag is that every time someone discovers Perry's a secret agent, the first thing they ask about is the hat.

Theme Park Character
Perry's Agent P persona is a rarely seen character at the Disney theme parks. He has however, made appearances in the Phineas and Ferb autograph sessions on August 5, 2011 to celebrate the DVD release of Across the 2nd Dimension at Disney's Hollywood Studios and at the biennial D23 Expo in Anaheim, California in 2011 and 2013. However, a Perry inaction figure and Perry are on the party truck of Phineas and Ferb's Rockin' Rollin' Dance Party at Disney California Adventure. He has also been part of the annual Disney Parks Christmas Day Parade telecasts in 2010, 2011 and 2012, and has also been part of the annual Mickey's Halloween Party hard ticket event at Disneyland.

Perry's first appearance was along with Phineas and Ferb at Disney's pavilion of the Licensing Expo in Las Vegas on July 7, 2010. Agent P has also appeared with First Lady Michele Obama to do the Platypus Walk during a celebration of the second anniversary of her "Let's Move" project utilizing the Disney Magic of Healthy Living program at ESPN Wide World of Sports at the Walt Disney World resort in Lake Buena Vista, Florida.

Outside the theme parks, Agent P has made appearances starting with the Perry the Platy-Bus tours with the Phineas and Ferb costumed characters to promote the Across the 2nd Dimension movie in 2011, including appearances at San Diego's Comic Con International, the grand opening of a redesigned Disney Store at The Shops in Montebello, California and at the 2012 White House Easter Egg Roll. During the second Platy-Bus Tour in 2012, he made a surprise appearance at Chicago's Navy Pier with Dan Povenmire, Jeff "Swampy" Marsh, Vincent Martella and Alyson Stoner.

Perry appears in the attraction Agent P's World Showcase Adventure in Epcot at Walt Disney World, which replaced a similar attraction with a Kim Possible theme.

The Best LIVE Tour Ever!
Agent P was part of "Disney's Phineas and Ferb: The Best LIVE Tour Ever!" show in the production's subplot in which Dr. Doofenshmirtz builds an Audience Controlinator. Tiffany Westbrook played the real teal spy in the show, while Dani Lobella took over the role for Ms. Westbrook in Mexico City in 2011-12. For the 2012-13 tour, the role was played by Hilary Kadoya.