Pokemon. Duh. I would love having one of those things. Yes, I would probably be killed in the crossfire, or from being cut or something because there are no hospitals for people, just pokemon, but still. Commanding an animal to do battle with other animals.

. Also i think people are forgetting that a good percentage of people within anime and manga are depowered or very easy to kill (see Dragonball and Naruto respectively) If I was one of the powered people, then I would chose Naruto hands down. Being able to pull random techniques out of my ass would be fantastic.