- Chinese episode title: 寻找大大怪 ("Xúnzhǎo dàdà guài")English episode title: "Looking for Big M." (Lookus English dub)
Big M. orders a flying shark to help him in his latest evil plan. However, the shark bites him and the resulting injury gives him amnesia and causes him to join the Supermen in defeating that very same shark.
"Looking for Big M." contains the following tropes:
- Amnesia Episode: For Big M.
- Amnesiac Villain Joins the Heroes: Big M. joins the heroes to defeat the evil shark due to forgetting he was the one who commissioned it in the first place.
- Burp of Finality: Subverted. The shark burps after eating Careful S. and his duplicates alive, but spits him back out along with everyone else he consumed after Happy S. hits him in his weak point.
- Butt Biter: The shark bites Big M. in the butt, causing him to jump into the air in pain and hit a moon, giving him amnesia.
- Faking Amnesia: Big M. proposes pretending he has amnesia as part of his evil plan. And then he actually does get amnesia, and Little M. thinks he's still going with his original fake amnesia idea.
- Flower-Pot Drop: Happens to Big M. at the end of the episode when he says whoever gave Happy S. the shark's weakness should be hit by a flower pot and attacked by a bunch of dogs.
- Flying Seafood Special: This episode's Monster of the Week is a shark that floats around in the air.
- Injury Bookend: Big M. hitting his head on a moon causes him to lose his memory, and getting flung into a trash can reverses it.
- Mistaken for Murderer: An amnesiac Big M. sees Little M. with a knife and scissors and thinks he wants to kill him. He was actually just making some food for him.
- Pain-Powered Leap: Big M. does a cartoonishly exaggerated jump into space and hits his head on a moon when he sees the shark biting him in the behind.
- Red Eyes, Take Warning: The shark in its fully-transformed form has red pupils.
- Tempting Fate: At the end of the episode, Big M. shouts that the person who told the shark's weakness to Happy S. should have a flower pot dropped on his head and attacked by dogs. But since Big M. was that person and doesn't realize it, he has both of those exact things happen to him a second later.
