Mr. Bumby

a wacky little sock eating bed monster who first debuted in SpongeBob and Friends Find The Black Cauldron, where he was a slave to the horned king for eating the horned kings socks, and was comdamned to sing kariocky in the mess hall for the human minions of the horned king. he help Spongebob and friends take him down, and it is assumed he return back to his world afterwords.