"I know what we're gonna do today. (Laughing Maniacally)"
Nothing is known about how Phineastein grew up, but he appears to have created several monsters in his time. One monster was a two headed cow, but it either disappeared or ran away. He lived in a castle governed by a disproving governess named Constance, who, like Candace, constantly tried to "bust" Phineastein and his henchman Ferbgor by telling on them to the Angry Mob. ("The Monster of Phineas-n-Ferbenstein")
Creating a MonsterEdit
At some time, Phineastein was gathering spare parts from Platypi, when he saw a flier for a "Monster Ball". Inspired to enter it, he and Ferbgor created a new monster, this time, a platypus one.
Then, after the monster runs after Jekyll Doofenshmirtz, he and Ferbgor get him back. After a while, they run into an Isabella lookalike, who informs them he's going to the monster ball.
In the monster ball, he finds the monster, who has just eaten Dr. Jekyll Doofenshmirtz. Just then, Constance arrived, with the angry mob following. Constance saw the potion brewer that Dr. Jekyll Doofenshmirtz built, and took the drink from inside it, and drank it. She turns into a monster, as a result. Just then, the winner of the Best Monster Contest is announced, and Constance is the winner. ("The Monster of Phineas-n-Ferbenstein")
Future and LegacyEdit
While nothing is known about the rest of his life, it is made clear that he is dead as of the present time. Phineastein's legacy lives on through the memories of Reginald Fletcher and his grandchildren of whom he told his story to.
- Dr. Phineastein looks exactly like Phineas Flynn, but he is an evil scientist, unlike his original counterpart. He has never been said to be related to anyone in the Flynn family But he does seems to be related to Constance and may be (and most likely is) related to the Flynn Family.
- Dr. Phineastein lived in Druelselstein with Ferbgor.