DoodleBob, or DoodleBoy as called by SpongeBob at times, was a crudely-drawn self-portrait of SpongeBob SquarePants that came to life. He appeared in the episode Frankendoodle. Because he was created using a magic pencil (which belonged to a human artist at sea who accidentally threw it into Bikini Bottom, which SpongeBob and Patrick found), DoodleBob came to life. SpongeBob intended to use him to play a harmless prank on Squidward, only for DoodleBob to start beating him up, swipe the magic pencil, and run away crazily, screaming gibberish. SpongeBob and Patrick chased him to where he had taken residence in a crudely drawn version of SpongeBob's Pineapple house, and when they cornered him SpongeBob erased DoodleBob with the magic pencil. However, unknown to SpongeBob and Patrick, SpongeBob missed one of DoodleBob's arms.
The arm infiltrated SpongeBob's house that night and then used the magic pencil to restore himself (and also adds a pair of evil eyebrows) before attacking SpongeBob. During a chase, he erases a portion of his house as well as SpongeBob's butt. As the DoodleBob corners SpongeBob, he erases a portion of him (as possible payback) and thus mocks him, provoking SpongeBob. SpongeBob and DoodleBob then struggle with the pencil and cause it to break in half; SpongeBob restores himself, and DoodleBob sharpens his piece of the pencil (though SpongeBob accidentally flings his part of the pencil away through a window at Squidward's house). DoodleBob corners SpongeBob once more, but when he is about to capture Spongebob and literally erase him from existence, he gets stuck on a piece of paper and Spongebob realizes this, then captures him in an empty book.
The next morning, Patrick comes to SpongeBob's house and asked what was making all the noise last night, and sees DoodleBob framed on the wall. SpongeBob tells him what happened and says that DoodleBob was not evil but rather "a two-dimensional creature trapped in our three-dimensional aquatic world, longing for a purpose."
He also returns in the cell phone game SpongeBob SquarePants: Bikini Bottom Pursuit as a boss.
He speaks gibberish and in Drawn To Life, when he is seen arguing with Doodlepants about something the text appears like random letters rather than "[Doodlebob speaking gibberish]" as seen in the Captions of Frankendoodle.