Alvin
Character
Alvin is the granduncle of Sheldon J. Plankton and only appears in A Plankton Family Tree.
Description
He is the same shape as his mother, Basia, but sports a pink top hat with a red ribbon
Biography
He was born to Seymour and Basia in Bikini Bottom. He has three siblings: the Moe Bros and Ella Plankton.
At some point, according to Plankton, "he disapeared without a trace. All they found was his hat in a pool of ketchup."
Trivia
- Alvin looks more like a Krill then a Plankton.