Futurama. The story is that in the future they designed a robot top be Santa, since a Robot Santa would be more efficient. But, of course due to a programming error, the Robot Santa judged people too harshly and everyone was deemed to be naughty, except Zoidberg.
Robot Santa rides around in a sleigh and shoots people with missiles and the like.
One of my favorite lines is when Robot Santa is stuck in ice and cannot go out on mayhem. Bender dons the hat and becomes the "Good Santa" When he returns Robot Santa is free and gives Bender a gift.
Robot Santa: "By the way, Bender, here's a small token of my appreciation for being Santa while I was trapped in the ice."
Bender: "Ooh. Hey chief, you screwed up. There's nothing in here."
Robot Santa: "Oh, it might appear empty, but the message is clear. Play Santa again, and I'll kill you next year! Ho, ho, ho!"