Appearances
Bold means character played a Major role
Appearances = 87 episodes
Episodes
- Plankton! (debut)
- Culture Shock
- F.U.N.
- Sleepy Time
- Valentine's Day (cameo)
- Walking Small
- Imitation Krabs
- Christmas Who?
- Welcome to the Chum Bucket
- Band Geeks
- The Fry Cook Games
- The Algae's Always Greener
- Mermaid Man and Barnacle Boy IV (cameo at the ending)
- Snowball Effect (cameo at beginning)
- Krusty Krab Training Video
- Party Pooper Pants
- Plankton's Army
- The Sponge Who Could Fly
- SpongeBob Meets the Strangler (non-speaking cameo)
- Fear of a Krabby Patty
- Krabs vs. Plankton
- Dunces and Dragons
- Enemy In-Law
- Mermaid Man and Barnacle Boy VI: The Motion Picture
- Patrick SmartPants (speaking cameo)
- Wishing You Well
- New Leaf
- Best Frenemies
- Friend or Foe
- Spy Buddies
- Krabs à la Mode
- Bucket Sweet Bucket
- Goo Goo Gas
- Atlantis SquarePantis
- Mermaid Man vs. SpongeBob
- Pest of the West (ancestor Dead Eye Plankton)
- 20,000 Patties Under the Sea
- Banned in Bikini Bottom
- Stanley S. SquarePants
- Krabby Road
- Spongicus
- Patty Caper
- Plankton's Regular
- The Krabby Kronicle
- Komputer Overload
- No Hat for Pat (cameo)
- Chum Bucket Supreme
- Single Cell Anniversary
- Truth or Square
- Chum Caverns
- Tentacle-Vision
- Someone's in the Kitchen with Sandy
- The Inside Job
- Greasy Buffoons
- SpongeBob's Last Stand
- One Coarse Meal
- The Play's the Thing (cameo)
- Rodeo Daze
- Gramma's Secret Recipe
- The Main Drain
- The Great Patty Caper
- That Sinking Feeling (speaking cameo)
- Buried in Time
- Shellback Shenanigans
- Perfect Chemistry
- The Other Patty
- Drive Thru
- Frozen Face-Off
- Squidward's School For Grown-Ups (speaking cameo)
- Sweet and Sour Squid
- A SquarePants Family Vacation (cameo at the begining)
- Walking the Plankton
- Plankton's Good Eye
- The Krabby Patty That Ate Bikini Bottom
- Fiasco!
- Free Samples
- Karen 2.0
- For Here or To Go
- Super Evil Aquatic Villain Team Up is Go!
- The Good Krabby Name (cameo)
- Hello Bikini Bottom! (two speaking cameos)
- It's a SpongeBob Christmas!
- Chum Fricassee
- Squirrel Record (minor role)
- Move It or Lose It
- Gary's New Toy (picture on bus bench)
- Eek! An Urchin
Movies and Shorts
- Plankton's Holiday Hits
- The SpongeBob SquarePants Movie
- Can't Swim
- Remodeling
- Loop dee Loop
- Plankton Pays
- The SpongeBob SquarePants Movie 2
YouTube Shorts
- Patrick's First Day At Work
- SpongeBob Clay Animation
- Plankton's Record Player