The Simpsons

Season 15, Episode 9

Episode Title: I, (Annoyed Grunt)-Bot

Air Date: 2004-01-11

Overview:

Homer builds a battle robot to win Bart's respect, and places it in a tournament against other robots. What Bart does not know, though, is that the robot is actually Homer in costume. Meanwhile, Snowball II dies and Lisa tries to find a replacement cat.