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Doofenshmirtz's schemes and inventions, primarily known as "Inators," are plans and devices created by Dr. Heinz Doofenshmirtz as a means of dominating and taking over the Tri-State Area or other locations. They are typically grandiose in scope, involving a complicated solution instead of applying a simpler, more practical method. One example is inventing a "wood magnet" when dynamite would be more effective and faster ("Are You My Mummy?").

The motivation behind their development is typically a need to exact revenge for an unpleasant incident in his life, or to resolve a situation that annoys him. An example of the latter is the plan to transport Big Ben from London to Danville instead of buying a larger clock because shopping for a clock would be too much of a hassle ("Elementary My Dear Stacy").

Though the names given to the inventions tend to end in "-inator", so far he has made 23 inventions lacking the "-inator" suffix. It is not known how he can afford to build all his inventions, though he does mention that he gets a large alimony check every month ("Got Game?", "Rollercoaster: The Musical!").

His schemes and inventions are listed by episode.

Most of his schemes backfire at Phineas and Ferb's work, destroying it or infecting it, leaving Candace without any evidence to bust the boys. One invention called the "Shrink-inator", which he always forgets to unplug, has done away with the boys' work more than once ("Does This Duckbill Make Me Look Fat?", "Let's Take a Quiz"). However, a few are quite successful in nature, such as the time when Doofenshmirtz succeeded in stealing the Key to the City, opening a portal to alternate dimensions, moving the Earth away from the Sun to an early autumn, and building a Tri-Governor's Mansion on top of City Hall to become Tri-Governor. ("Cranius Maximus", "Phineas and Ferb Save Summer", Phineas and Ferb The Movie: Across the 2nd Dimension, Last Day of Summer)

When Doofenshmirtz is defeated by Agent P, it is not always known how he returns to normal, as he will frequently find himself in impossible situations. At one time he significantly aged himself ("Lights, Candace, Action!). He has wound up in outer space several times ("Unfair Science Fair Redux (Another Story)", "The Doof Side of the Moon", "We Call it Maze"), in another dimension ("It's a Mud, Mud, Mud, Mud World"), miniaturized and wrapped up in a small box ("Invasion of the Ferb Snatchers"), stuck inside a whale ("Phineas and Ferb Hawaiian Vacation", "Perry Lays an Egg") or betrayed by an assistant/friend ("Phineas and Ferb Save Summer", Phineas and Ferb The Movie: Across the 2nd Dimension) and even turned into a head ("Terrifying Tri-State Trilogy of Terror").

Within the series

Main article: List of Doofenshmirtz's schemes and inventions/Season 1
Main article: List of Doofenshmirtz's schemes and inventions/Season 2
Main article: List of Doofenshmirtz's schemes and inventions/Season 3
Main article: List of Doofenshmirtz's schemes and inventions/Season 4

Outside the series

Episode Invention(s) Scheme
"Spot the Diff" marathon Changenator-inator Doofenshmirtz used this machine to change all the episodes shown in the Spot the Diff marathon.
"Disney XD" Disney XDOOF
Xdoof
This is the commercial on Disney XD when Doofenshmirtz turns the Disney XD logo to XDOOF.
"Disney Channel" Remote Control-inator This is the commercial on Disney Channel when Doofenshmirtz launches a Doof Channel.
"Comic-Con Phineas and Ferb: Summer Belongs to You! Sneak Peek"
  • Erase-the-special-episode-inator
  • Hide-the-secret-password-inator
This is the commercial at Comic-Con when Dr. Doofenshmirtz steals the first part of "Summer Belongs to You!" and viewers go on to http://disney.go.com/xd/phineasandferb/videos/ to unlock it with the secret password, "platypus".
"Disney's Phineas and Ferb: The Best LIVE Tour Ever! Audience Control-inator
IMG 8286

Used to control the audience at the show.

Agent P's World Showcase Adventure : Japan Baby-inator
Giant Robot
Doof invents this to turn people into babies. That way, nobody could outrun his giant robot.
Doofenshmirtz uses it to try to take over Japan's Tri-Prefect Area. However, it is slow.
Shark Tank Shrink-inator Doof tries to allow the sharks, led by Dallas Mavericks owner Mark Cuban, to invest in his newest inator.
Doofenshmirtz's Daily Dirt Tilt-inator
Tilt-inator - Doofenshmirtz's Daily Dirt

Cute-Puppy-Call-inator
Cute-Puppy-Call-inator

Bake Sale Obliterationator
Bake Sale Obliterationator
Doof bribes Justin Bieber to appear on his web show with the Tiltinator from "We Call it Maze".
After being inspired by how the stars of Duck Dynasty made their fortune, Doofenshmirtz invents the Cute-Puppy-Call-inator. Unfortunately, when he blows it, thousands of spiders invade his lab.
To get rid of bake sales, Doof creates the Bake Sale Obliterationator.


In Milo Murphy's Law

Like in Phineas and FerbHeinz Doofenshmirtz would occasionally build inventions, usually with the -inator suffix, to aid himself, this is shown again in Season 2 of Milo Murphy's Law.


Image Name Description Appears in
[1] Time Travelinator An Inator used to travel in time, but cannot work without Time Juice. Doofenshmirtz originally invented this marvel to get Wyatt Burp orange soda in the 1960s, but allows CavendishDakota and Orton to use it in order to defeat the Pistachions.

The original model looked like a taco according to Dakota, so once Doofenshmirtz had to reconstruct it after a case of Murphy's Law, he made the conscious decision to make the second model resemble a taco stand.

The Phineas and Ferb Effect
[2]
[3] Professor Time's Time Machine Once Time Juice has been discovered, Doofenshmirtz, now going by the moniker Professor Time, perfected his Time Travelinator and used it to travel back in time to pick up Orton and slay Derek in 1955 in order to avert the damages done by the Pistachions.

This model closely resembles the time machine made by Xavier Onassis, which had been fixed by Phineas and Ferbin It's About Time!

The Phineas and Ferb Effect
[4] Shock Absorber Absorbinator As one of many evil schemes during the summer, Doofenshmirtz wanted to use this Inator to collect all the shock absorbers in the Tri-State Area, and sell them back with a higher pricing. This specific scheme was planned on a day Perry the Platypus was on vacation and Agent Gwould substitute for him, but Diogee took his place instead. Agee Ientee Diogee(Appears in flashback(s))
[5] Shrink Grenade A grenade variant of Doofenshmirtz's various Shrinkinators. Its shape, size and color is shared with that of a tennis ball, so when Doofenshmirtz throws a tennis ball for Diogee to fetch, the dog took a Shrink Grenade out of a box of many by mistake, as Doofenshmirtz shrinks himself by accident with it. Agee Ientee Diogee(Appears in flashback(s))
[6] Transportinator When Recurring Raccoon dunks the TV remote - which Martin wanted to use to watch Milo and Amanda at Cake 'Splosion - in a bird fountain, causing the TV to repeatedly change channels, Doofenshmirtz decides to send the raccoon across town with this device. He accidentally hits Martin. Cake 'Splosion!
[7] Unnamed call-listening device Doofenshmirtz once made an elaborate setup during his stay with the Murphys to join Sara's conversation with Nealon her cellphone. Doof's Day Out(Appears in flashback(s))
[8] Reconstitute-Inator A device Doofenshmirtz was working on in order to turn raisins into grapes. During his visit to the Natural History Museum alongside Milo's class, Doofenshmirtz decides to give up and tosses the Inator aside, reviving a triceratops fossil by accident. Doof's Day Out
[9] Unnamed organ go-kart A go-kart Doofenshmirtz constructed out of organ exhibits with Milo and Melissa's help, in order to get Zack out of the Digestive Tract Exhibit quickly. According to the Museum Tour Guide, this caused to increase the popularity of said exhibit. Doof's Day Out
[10] De-Guminator Doofenshmirtz constructed this device in order to rid Danville of sidewalk gum, in order to get more into his role as a good guy and destiny to become Professor Time. The Inator causes more harm than good and Perry had to eventually stop him, but Melissa managed to use the Deguminator in order to get Ol' Bessie to run before Victor Verliezer is allowed to demolish it. The Ticking Clock