Darth Vader is known for getting annoyed at anything we could call funny. He hates everyone besides Roll, his companion, and a girl he likes (who turns out to be his sister). In his halloween two-part special, Darth Vader turns out to be easily manipulated into not getting a special wish-rock for Halloween. He is also shown to be arrested for attacking a Halloween USA clerk, and hating Halloween due to a terrible holdiay.
Darth: When I'm done with you, you'll have a butt twich!
Frog: I already do.
Darth: I don't know why, but the day I died was a very happy day for me! I got ice cream!
Darth: I will now proceed in killing you.
Darth: He's Dr. Uni, reporting for duty! he's a piece of Poopy!!!!
- akward silence *
Dr. Uni: That's not very nice, son.
Patient: Dar--Dar--Darth---Vader! May I shake your hand???
Darth: Why, of course you can shake my hand!
- Vader grabs his hand and throws him to other side of the room *
Darth: You're a loser, and so is your mother!!!