Keet: Western Animation
- Any character played by Gilbert Gottfried, including his nightclub stand-up act.
- Aang from Avatar: The Last Airbender certainly qualifies, particularly in the earlier episodes. He does undergo some serious Character Development, though, once he discovers the gravity of the circumstances he and his friends are in. His Keet-ness is taken Up to Eleven when an Earth Kingdom general, who is attemtping to invoke the Avatar State for military use, has him drink the Avaverse's equivalent of Red Bull.
- Though older than most examples, Bolin from The Legend of Korra has shades of this as well.
- Despite being even older than Bolin, Varrick the eccentric businessman is more energetic and playful than most children!
- Freddy the ferret from Back at the Barnyard.
- Star from Balto.
- The title character of Bonkers. Up to Eleven.
- Mr. Whiskers from Brandy & Mr. Whiskers.
- Dog from CatDog.
- Rusty from Chucklewood Critters.
- Code Lyoko: Johnny, starting in Season 3 and Odd from beginning to end.
- Skeeter Valentine from Doug
- Doug himself had some shades of this when he was a little kid. In the show itself he's more of an Adorkable kid.
- Stuffy the blue dragon toy from Doc Mcstuffins.
- Wooldoor Sockbat from Drawn Together.
- Jimmy from Ed Edd n Eddy.
- Gene from Bob's Burgers.
- GIR from Invader Zim.
- Henry and Sniz from KaBlam!!
- Tommy Gilligan from Kids Next Door is this and a Large Ham.
- Moral Orel: Orel Puppington, especially as a 4-year-old in Beforel Orel.
- Brattus from Mr. Bogus would also qualify, as well as Bogus himself.
- Braeburn of My Little Pony: Friendship Is Magic has shades of this and Motor Mouth. He's enthusiastic, usually quite cheerful, and can only be stopped talking by his cousin Applejack.
- Discord is a malevolent example.
- Soarin is also this, particularly when he almost drops his pie.
- And now we have Cheese Sandwich, who is basically a male Pinkie Pie, and voiced by "Weird Al" Yankovic.
- Pym from Next Avengers: Heroes of Tomorrow.
"Maybe he was the Knight! Or the Pixie!"
"Maybe he was the Knight!"
- From Phineas and Ferb, Phineas Flynn. Dear GOD, Phineas Flynn.
- T.J. Detweiler from Recess
- Gus when he was in kindergarten.
- Scaredy and Dave from Scaredy Squirrel.
- The titular SpongeBob SquarePants.
- Otto, of Super Robot Monkey Team Hyperforce Go!.
- Shifty Dingo from The Adventures Of Blinky Bill. Especially when he's in a good mood. "I'm going to a party! I'm going to a party!" (bangs drum repeatedly)
- Sheen from The Adventures of Jimmy Neutron: Boy Genius
- Gumball and Darwin from The Amazing World of Gumball.
- Daggett from The Angry Beavers has shades of this.
- The Fairly Oddparents: Timmy Turner is this arguably. He has No Indoor Voice and is very very energetic. He, in fact, is the center of a Toy Ship, several in fact.
- Peppy Happy Gary and Cosmo qualify as well.
- Mr. Tickle from The Mr. Men Show, also Mr Bump.
- Miguel from The Road to El Dorado
- The Evil Midnight Bomber What Bombs at Midnight from The Tick, who is constantly rattling off conversations about his evilness to no one in particular and has severe trouble not bursting out phrases like "Down with government!" during normal conversation.
- The Cat from The Cat in the Hat Knows a Lot About That!.
- Blurr from Transformers Generation 1. Voiced by that Micro Machines guy.
- Russell from Up.
- Buster Baxter from Arthur is easily the most fun loving out of Arthur's friends. Whenever he's feeling down, you know the rest of the cast is screwed.
- Pinky from Pinky and the Brain
- The Chief Blue Meanie from The Beatles' movie, Yellow Submarine.