Morton and Lemmy attempt to catch a thief who has stolen a valuable star from K. Rool.
Tropes:
- Affectionate Parody: This episode is a reference to Mario & Luigi: Superstar Saga, from the title to an amnesiac Bowser becoming Rookie.
- A Day In The Lime Light: This episode focuses on Morton and Lemmy going on an adventure to catch a thief who have stolen King K. Rool's star.
- Easy Amnesia: Bowser winds up losing his memory due to heavy drinking early on in this episode. He is then found by Popple and convinced that he is a cat burglar named Rookie.
- Plot-Mandated Friendship Failure: When Popple and Rookie manage to escape from Lemmy and Morton with the green star, Morton and Lemmy get into an argument which eventually ends with them splitting up for a bit.
- Screw This, I'm Outta Here: Popple decides to make his escape after Lemmy and Morton defeat Rookie. He doesn't get far due to Lemmy throwing a football at him.
- Tap on the Head: Lemmy and Morton manage to restore Bowser's memory by jumping on his head.
