Sheldon J. Plankton is the main antagonist from "SpongeBob SquarePants".
He played Berkeley Beetle in Candacelina (CyberChaseZoneFilms2010 Style)
He played Lord Farquaad in SpongeBob (Shrek)
He played Abis Mal in Dumboladdin 2: The Return of Mojo
He played Mr. Twitchell in Jiminy Returns
He played Hamegg in Lincoln Boy (Astro Boy)
He played All Hands in Baloo & Yogi Rescue Rangers
He played King Goobot in E.B.: Bunny Genius
He played Bill Cipher in Gravity Falls (JimmyandFriends Style)
He played Hades In Oscarcules
He played Escargoon in Les: Right Back at Ya!
He's King Dedede's Assistant
He played Banzai in The Meta King
He played Diesel in Sora and Friends
He played Bartok in Ediestasia
He played Joe in Help! I'm A Sea Creature
He's an evil and intelligent fish
He played The Huntsman in Smurfette White and the Seven Turtles
He played Gantu in Kai Lan & Chase and Chase! The Movie
He played Cri Kee in Cassielan and Cassielan 2
He played Bartholomew in The Great Spider Detective
Plankton is an alcoholic. He is constantly seen drinking from a beer mug and becomes disappointed whenever he runs out. During Blowhole's song, when Dr.Blowhole dumps a bottle of champagne into his water fountain, Plankton gets very excited and immediately runs over to the fountain, where he starts drinking from it. Then Blowhole kicks him and Plankton falls and starts swimming around in it. When Dr.Blowhole talks about his history with Naills, Plankton starts crying about the part that Dr.Blowhole never had a moment's peace in mind.
Later, when they are finishing up a verse of the song, he drunkenly says, "To Blowhole, the world's greatest rat!", which makes Dr.Blowhole very mad (as he despises being called a rat). He throws him outside the hideout and summons Pink Panther with a bell. However,Plankton is too drunk to notice him, and he easily catches and eats him. Plankton starts drunkenly singing the praises to Blowhole and is swallowed whole just as he is about to call his vengeful boss a rat again. After a short period of mourning from the other henchmen,Dr.Blowhole suggests that they finish the song before he has Pink Panther eat the rest of them, which they do out of fright.
- In SunBob ShimmerPants He is played by Bowser
- In SpongeDumbo, The SpongeDumbo SquareElephant Movie and The SpongeDumbo Movie: Elephant Out of Water He is played by Scar
- In Wooldoor Sockbat (Spongebob Squarepants), The Wooldoor Sockbat Movie (The Spongebob Squarepants Movie) and The Wooldoor Movie: Sockbat Out of Paper (The Spongebob Movie: Sponge Out of Water) He is played by Bill Cipher
- In The DannyBob CatPants Movie He is played by Professor Ratigan
- In Spongebob Squarepants spoof for 4000Movies he is played by Aldrin Klordane.
- In StanleyBob GriffPants, He is played by Stripes the Tiger
- In SuperBob ReadersPants, He is played by Shao Kahn
- In BubblesBob UtoniumPants, He is played by Jynx
- In D.W.Bob ReadPants, he is played by Mandy
- In Batreg Bluepants, he is played by Grim Creeper
- In RemyBob RatPants, he is played by Stewie Griffin
- In AmitieBob PuyoPants, he is played by Monika