Plankton and Karen - online puzzles

Sheldon J. Plankton and Karen Plankton are fictional characters in the American animated television series SpongeBob SquarePants. They are respectively voiced by Mr. Lawrence and Jill Talley. Their first appearance was in the episode "Plankton!" on July 31, 1999. They were created and designed by marine biologist and animator Stephen Hillenburg, the creator of the program, with additional character development by Lawrence.

Plankton is an intellectual planktonic copepod who runs the unsuccessful Chum Bucket restaurant alongside Karen, who is a talking supercomputer. Plankton is the arch-rival of Mr. Krabs, who owns the far more profitable Krusty Krab restaurant and sells a fictional burger called the Krabby Patty. Plankton and Karen often devise schemes to steal the secret Krabby Patty recipe, but their efforts are always thwarted by Krabs and his employees.

Critical reception for Plankton and Karen has been positive, with praise directed toward their voices and dialogue together.