William William Bo William Banana Fana Fo Filly Plankton
Physical appearance
Gender: Male
Color: Green or blue
Classification: Plankton
Siblings: Possibly at least one of Sheldon's Other Cousins
Grandparents: Grandpa Plankton
Grandma Plankton
Aunts: Mrs. Plankton (by Marriage)
Uncles: Mr. Plankton
Cousins: Sheldon J. Plankton
Ancestors: Planktonamor
Dead Eye Plankton
Friends: Plankton
Other cousins
Karen Plankton
Enemies: Eugene H. Krabs
Squidward Tentacles
SpongeBob SquarePants
Series information
Appearance: "Plankton's Army"
List of characters

William William Bo William Banana Fana Fo Filly Plankton, more commonly known as Billy Billy Bo Billy Banana Fana Fo Filly, is one of Sheldon J. Plankton's cousins. His only appearance is in the episode "Plankton's Army."


He is taller than Plankton. He is a hillbilly, like the rest of Plankton's cousins.

Sleepy Time 052
Article needs expansion
This article is in need of expansion, but it is not a stub. You can help Encyclopedia SpongeBobia by adding more information. Please remove this template when done.

Ad blocker interference detected!

Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers

Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.