Plankton (Narmak)

Plankton is the owner of the Chum Bucket and the main antagonist of the YouTube parody animation by Narmak, the SpongeBob Squarepants Anime OP and its sequel.

Unlike his counterpart from the Nickelodeon cartoon, this Plankton is much more nefarious and cruel. He is responsible for turning Squidward against his friends and using him to defeat the Krusty Krew.

The SpongeBob Squarepants Anime - OP 1
Plankton convinced Squidward to quit his job at the Krusty Krab and sign a contract binding him to the Chum Bucket. He is seen sitting at his desk next to Karen, grinning menacingly.

Though Squidward initially had some regrets about his decision to abandon his friends, these disappeared after Plankton injected him with the Chum serum, granting him superpowers. Plankton then sent his superpowered minion to the Krusty Krab to fight the Krusty Krew. His super soldier proved a very formidable foe, cutting off Sandy's arm and even killing Patrick.

The SpongeBob Squarepants Anime - OP 2
Plankton is seen only at the beginning of the intro, though his influence can be felt throughout, such as when we see Squidward commanding an army of Plankton's robot drones.