In Ven's story, Isa berating Lea after his fight with Ven. It's mainly the way he says it!
Isa: "From where I stood, the only thing you drew was a big "L" on your forehead for 'Loser', 'Lame', 'Laughable'..."
Just later, Lea mentions that he wants everyone he meets to remember him so he can live forever in their memories.
Isa: I know I won't forget you. Believe me, I try all the time.
Lea: [smugly] See? I'm immortal!
You can invoke one if you beat someone in silly ways. For example; beating That One Boss when you get them to charge into mines or putting the various bosses of each storyline to sleep in a notable aversion of Useless Useful Spells.
Somewhere in the world, where humor lies extinct, one cat will supply moments of funny with his existence alone. That cat... is Captain Justice. "And that's 'justice' with a J."
Really, Pete is all around hilarious in this game. The best parts are his introductions, not just for how over the top they are, but because of the utterly blank expressions of his audience. They just have no idea.
Ven's look when Peter Pan says that gold and doubloons are worthless.
In Aqua's part of the story at Castle of Dreams After helping Jaq get the key to Cinderella, she watches Lady Tremaine from a distance. Just as the duke is leaving, she suddenly grows right back to normal size and falls down the stairs. She also tries to stall for time by offering to try the slipper herself. It's pretty funny. Especially that Tremaine lampshades how awkward it is that Aqua BROKE INTO THEIR HOUSE!
Aqua: "WAHHHH!!" (clunk)
Anastasia: "She's probably here to rob us!"
Terra's story. Neverland. This troper cannot be the only who thought that Captain Hook had had a run in with another Xehanort ally when he mentioned someone 'after the light'. Then...
Terra: "Tell me more about this boy. What's his name?"