Homer and Bart participate in a ''{{Series/Robot Wars}}''-style robotic combat game show with Homer disguised as a robot in order to help his son, as building an actual robot was beyond him. Meanwhile, Snowball II dies and Lisa goes through a string of replacement Snowballs.

!! Tropes:
* CallBack: The montage of Homer and Bart winning their fights is set to "Watching Scotty Grow". When Homer is losing the final bout, he deliriously sings a few lines of the song.
* LoopholeAbuse: Averted. When Homer was announced as a robot fight champion despite not being a robot, the one announcing Homer dared everyone to state any rule prohibiting humans from being robots. He was then shown Rule Number One.