SpongeBob Plankton and Spot Sticker
Besides Karen and Krabby Patty, Spot is another character that could make him smile and be happy. The Spot is Plankton's amoeba that first appears in the episode Plankton's Pet. He behaves like a dog, likes walking like one, and barks. He also seems to be brave, protecting his owner if he is in danger. SpongeBob Plankton and Spot Sticker.