When Cassim introduces himself as the King of Thieves, Genie's Code Red scene is hilariously over-the-top throughout, but theCrowning Moment of Funny is at the end of the scene, when dozens of Genie clones have surrounded Cassim and are all pointing guns at him:
Genie: "Do not attempt to move, or we'll be shooting ourselves!"
Genie's bit where he tries to cheer up Jasmine. All of it. It starts off with a Mrs. Doubtfire shout-out, and goes on from there.
Genie: (as Chico Marx) Hey, that'sa no good! What this wedding needs is a theme!
Genie: (as Groucho Marx) Needs a groom too, but let's work with what we have!
Genie: It's a joke! (deadpan) I do that.
When the 40 thieves are leaving the pavilion, the walls around Genie crash:
Genie: Ooh! (looks around nervously) This is not my fault! (While everything else collapses behind him) This was not built to code!
You know what? Any scene with Genie is going to have a funny moment. Robin Williams really steals the show in this movie. Behold! 1 and 2
"Trying to show your dad a better life wasn't stupid, Al! Leaving him alone with the parrot, that was stupid."
Cassim: We do not harm the innocent.
Iago: uh, for future reference, I'm as innocent as the day I was hatched!