The Rat is a character who appears in the first act of Skip and Sqak: The Strange Vacation. He is a black rat who lives in the palace cellar and locked all the doors. When Skip goes down the cellar to look for his frozen friends, he confronts the Rat who refuses to give him the keys because he hates "upstairers" (everyone living upstairs) for killing all his friends with mouse traps.
However, Skip builds his own mouse trap that the Rat quickly falls under the cheese on the trap. He tries to fight the resistance, but takes the cheese anyway and the trap snaps on him, killing him.