Refusing to help Lisa and the bullied kid gets you hilarious responses and a funny sound effect.
In Libra Town, an NPC says that going into others' houses and taking their things is a law of Porombo Island called "What's Mine is Yours." They say that they don't really understand it, but it's best not to question these things.
Bisco's goons leave after threatening you... and bump into each other.
Encountering a toilet Robopon named Johnny.
The biker gang terrorizing Cools Town and Dine Town calls itself the Smiley Gang.
If you give Dosbot up without a fight, the girl who gave it to you calls you a loser.
Mr. Wild tries to run away on his motorcycle, but loses the keys. When he finds the keys, it won't start anyway. This goes on for about 5 tries until he gets it right.
The Brownie sidequest has Mr. Brownie acting as a Jackass Genie to Professor Don, culminating in Don growing huge when he wishes to be the greatest professor.
Getting a Snorkel to breathe underwater; this happened in both games.
At Ghana Lake, the sukiyaki kid gives Cody a "ball" that's actually a bomb. It's promptly dropped into the lake, explodes, and raises the water town to the surface.
Robopon 2
The very beginning of Robopon 2 has Cody forget all of his Robopon at home.
Destroying Dr. Don's time machines every time you return from the past.
The amount of times stuff blows up. Everything blows up in this game. The story has a total of 36 explosions, not counting battles.
Getting a Snorkel to breathe underwater; this happened in both games.
The epitaphs for the members of Riggs Construction Company, which go out of their way to avoid saying the word "die."
The text when you're about to destroy the Battleship and say no.
Game: The Pandora's Box that is the Battleship has opened. Metaphors aside, will you press the red button? Player: No, I'm crazy. Game: Uhhh... you should really consider pressing the button... soon...
Dr. Zero lists off every positive virtue in the book as he wonders how Cody was able to defeat him.
Zero: What's this energy coursing through your very being? Love? Dreams? Hope? Life? Potential?