Timmy turner accidentally enters a wormhole into the Marvel Universe. He has no knowledge of this Universe. The first entity he meets is Odin and he's trespassed on Asgard.
No toon force
He has to abide by the rules in the TV show
He can't make a wish that directly affects Odin ("I wish he didn't exist")
He can't wish for multiple Odins
One has to be incapacitated or killed