Jealous of Megawatt's upgrades and all the girls throwing themselves at him over them, Thrasher and Blastus try to earn money to get upgrades of their own by getting a job at The Maul (an arena where robots get eaten and digested by a monster), but when that does not work, they try selling their coolant for easy cash.

Thrasher and Blastus feign being non-violent to join the Sunshine Group (a group of robots with faulty psycho-chips who act and are treated like mentally-challenged children) in order to avoid taking an upcoming standardized test, but soon discover that the Sunshine class is really a plot to get rid of non-violent robots.

Thrasher inadvertently agrees to babysit Maimy's younger brother when he tries to impress her, and he and Blastus accidentally start a war in the process. Meanwhile, Weenus is chosen to be a part of Harry S. Apocalypse High's fireworks show.

After staging a violent coup, Thrasher becomes school president and his friendship with Blastus becomes strained when Maimy begins falling for Thrasher.

Thrasher and Blastus drink a strange performance-enhancing tonic given to them by the janitor in order to become great Mutilationball players, and end up getting sent to a planet of angry blue ball creatures.

On a field trip to a forest to chop down evil trees, Thrasher befriends a talking plant who is after a highly-guarded fertilizer called SuperFudge.

Thrasher and Blastus start going through puberty and must journey to Jockstrap Island and pass the Trial of Robocles in order to become men.

Thrasher and Blastus join a group that Maimy starts dedicated to hurling elderly robots at other planets to keep them from going nuclear on Insanus, but when one of the elderly robots turns out to be Thrasher's grandmother, Thrasher must choose between letting her go or keeping her.

Blastus dates and nearly marries a sexy model from the planet Wretchnya, only for Thrasher to find out she is a pirate. Meanwhile, Megawatt and his parents wander the streets after believing that they are ghosts.