Sink Buddy is a sink briefly seen in "Bubble Buddy."
Role in episode
Sink Buddy appears in the episode "Bubble Buddy" when none of SpongeBob's friends want to play with him. As a result, he resorts to befriending inanimate objects. SpongeBob first tries Stick Buddy, which he drops on the ground. Next he tries Rock Buddy, which doesn't do anything. Then he tries Sink Buddy, which also doesn't do anything. Finally, he creates Bubble Buddy. He takes Bubble Buddy across Bikini Bottom where he annoys everyone.