A LetsPlay of VideoGame/{{Portal 2}}'s co-op by everyone's favorite cross-eyed Pegasus [[WesternAnimation/MyLittlePonyFriendshipIsMagic Derpy Hooves]] and her time traveling companion [[Series/DoctorWho Doctor Whooves]].

Created by {{Website/YouTube}}r [[http://www.youtube.com/user/BaldDumboRat BaldDumboRat]], also revered as ''the'' voice for Derpy amongst the FIM fandom.
* {{Angrish}}: Ditzy tends to fall into this whenever the Doctor screws up a puzzle.
* BigWordShout: The Doctor yelling "[[SayMyName DIIIIITZYYYYY!]]" frequently.
* BreakingTheFourthWall: Sometimes Ditzy or the Doctor will break character and speak as [=BaldDumboRat=] or Keikoandgilly rather than their actual character, leading to the other calling them out on it. Sometimes they break the fourth wall ''while'' staying in character - for example, Ditzy reading the chat questions or complaining about the cat fur in her face.
* CatchPhrase: The Doctor gets a lot. "I have an idea!" "[[OhCrap Oh dear.]]" "There we are!" "Trust me." "I'm not fat!" "That's not fair!"
** Ditzy herself gets "You're fat!" and an insincere "Sorry!"
* TheChewToy: The Doctor takes a lot of abuse.
* ComedicSociopathy: Derpy likes to abuse the Doctor a lot. Though it seems to be half this, half her being TheDitz her triggering a DeathTrap on him by accident.
* TheDitz: Derpy of course.
** GeniusDitz: She manages to figure out a few puzzles on her own.
* FunnyBackgroundEvent: In the final episode, during the credits, Derpy says she needs to take a nap. As soon as she says this, [=GLaDOS=] - [[ItMakesSenseInContext who is reading the files of the people in the credits]] - says that one of the people is "Always sleeping".
* HypocriticalHumour: Derpy cries and calls the Doctor a jerk when he causes her to die, but laughs and calls him stupid when the same happens to him.
* OhCrap: Typically Ditzy's reaction whenever the Doctor declares that he has an idea.
* RedOniBlueOni: Ditzy and the Doctor respectively.
* RunningGag: Derpy calling the Doctor fat and stupid. Usually fat.
* ShipTease: Sprinkled throughout, but most notably at the end of Part 3 when [[spoiler: Derpy seemingly begins to say "I love you" before the video cuts out.]]
* TheSmartGuy: The Doctor.
** DitzyGenius: He has his moments of failure.
* {{Troll}}: '''Ditzy.'''
* VitriolicBestBuds