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Character

Alvin is the granduncle of Sheldon J. Plankton who 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 disappeared without a trace. All they found was his hat in a pool of ketchup."

Trivia

  • Alvin looks more like a krill than a plankton.