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:
* AttackItsWeakPoint: Played With. Bart said Professor Frink's robot had one of these, only to see Frink upgrade it to the robot's strongest part.
* 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.
* CatsHaveNineLives: Mentioned during Snowball II's funeral. Lisa wrote her a poem.
-->'''Lisa:''' I wrote this poem for you. It's called "Cat Math".\\
''Four paws, plus one tail, plus nine lives equals one special cat.''\\
''One special cat minus nine lives equals one sad little girl.''
* CombatPragmatism:
** Homer's advantage against other robots is that he can fight dirty (smashing the controller of Jessica Lovejoy's robot, for instance).
** Ralph Wiggum's robot uses '''''an actual handgun as a weapon'''''. Homer somehow manages to dodge the gunshots (though a couple graze his arms), and he takes the gun away from Ralph's bot, emptying the clip on it.
* DisproportionateRetribution: Homer has a nightmare where he wins an Oscar and a robot kills him for making a speech that lasts longer than 30 seconds.
* 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.
* MeetMyGoodFriendsLeftyAndRighty: During Bart and Homer's first robot fight, Moe is seen in the audience, lamenting that he's seemingly the only adult sitting among a crowd of teenagers. The Squeaky-Voiced Teen, who happens to be sitting next to him, asks Moe if he has his children with him, prompting Moe to hold up his fists and introduce them as his two kids, "Screw" and "You".
* NonProtagonistResolver: Lisa's ready to give up on getting a new cat until an angelic figure approaches the Simpson home... and it's the CrazyCatLady, who flings a cat to Lisa.
* ThePollyanna: Olg Gill is glad he crashed his car because he'll get a check from insurance.
-->'''Gil:''' I'll be eating ''food'' tonight.
* ShoutOut: Frink's robot goes by the name of Chassis Clay, aka [[UsefulNotes/MuhammadAli Killhammed Aleee]] and looks like [[Film/RoboCop ED-209]].
** The robot that is crushed and turned into a trophy by Frink's robot resembles that of of an [[Film/TheTerminator Endoskeleton]]. Videotapes labeled "[[UsefulNotes/MuhammadAli Killhammed Aleee vs. Sugar Ray Leonard]]" and "Killhammed Aleee vs. [[WesternAnimation/{{Futurama}} Bender]] can be seen in the following scene.
* SnapBack: Lampshaded. At the end of the subplot, Lisa christened her final cat "Snowball II". When Principal Skinner called her out on this, Lisa says "I guess it is, ''[[DiscontinuityNod Principal Tamzarian]]''."
* SurvivorsGuilt: After Snowball II's death, Marge tries to console Lisa by saying she coped with the loss of her pet guinea pig, only to break down as she says the following:
-->'''Marge:''' Oh, Cinnamon! It should've been me who chewed through that extension cord.
* TakeThat: When Chief Wiggum disguises his car as a pizza car, he uses a Domino's Pizza logo to be sure nobody will want any pizzas from him. Sky 1's airing of the episode in the UK removes this scene, mainly due to the fact that Domino's sponsored the show for 10 years, and having a scene which insults the sponsor would have likely caused trouble.
* ThreeLawsCompliant: Frink’s robot, luckily for Homer.
* UnroboticReveal: In-universe.
-->'''Sideshow Mel''': That robot has given birth to a man!
* WhatMeasureIsANonHuman: "Can robots feel pain? If so, we are horrible, horrible people!"