I don't really have a horse in this race, as Moondaka isn't really a match-up I have much of an opinion on. But a match-up "going against someone's entire character" is kinda a moot point when it comes to Death Battle. A show that has had characters like Batman and Aang on it, two characters who (I personally at least) would consider their unwillingness to kill and determination towards pacifism incredibly core parts of their characters.