Plankton, unlike the one from SpongeBob SquarePants, is as power feeds B6 and K12 were re-routed, is a character from Pokemon Crimson and Navy, and Pokemon Harlequin. His species is a giant copepod/giant plankton monster and he battles the player. The class of him is called "Copepod".
Plankton battles in Achirudal Town with a Lavenseed.
- Level: 9
- Moves: Growl, Natural Gift, Present, Selfdestruct
Plankton battles with his Hardstate, Rayquick, Zoroark, Pinslice, and Sandragoon in Pokemon Crimson and Navy, however he uses his Lunaro in Pokemon Crimson and Solaran in Pokemon Navy. In Pokemon Harlequin, his team was Rayquaza, Cherrirbot, Kingfisher, Gastrovire, Cacteild, and Thunderaze.