After Bowser transforms into a giant monster and goes on a rampage after watching a horrible play, Mario and Bowser Jr. team up in order to stop him.
- Attack of the 50-Foot Whatever: Bowser becomes so massive and destructive that even Godzilla is forced to return to the ocean after having his role taken from him.
- Combined Energy Attack: Mario defeats Bowser by asking everyone to give him their "cat energy" to form his final attack.
- Disproportionate Retribution: Bowser goes on a killing rampage because his son's play was cringey. And because UberEats misspelled his name.
- Here We Go Again!: Bowser gets turned back to normal and loses all of his memories of the play and what happened afterward, only for it to be revealed that he recorded the play, which causes his eyes to glow red. In response, Mario flees before Bowser loses it again.
- I Have No Son!: Says this word for word when Bowser Jr. tries to get him to calm down.Bowser Jr.: Dad! Stop! It's just a play!Bowser: I HAVE NO SON.
- Red Eyes, Take Warning: Bowser reacts with these when he watches a recording of the play at the end.
- Sanity Slippage: Bowser turns into his fury form due to suffering from one of these while watching Junior's play.
- Screw This, I'm Outta Here: Mario's response to Bowser preparing to flip out again at the very end, leaving Bowser Jr. behind.
