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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 the 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).
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
|"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||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"||
||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||
Used to control the audience at the show.
|Agent P's World Showcase Adventure : Japan||Baby-inator|
|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|
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.