User blog comment:TheFoolisherFoolishFool/I don't see Ridley being playable at all.../@comment-4741898-20141030113421/@comment-5365557-20141031184342

I don't think Mario "kills" enemies. Goombas are pretty much hardheads, meaning they could probrably survive one stomp from Mario(which could explain they can respawn when you go away and come back to the enemy's spawn point). Koopa Troopas retreat in their shells.

I heard that the enemies Kirby eats on his quests go through a black hole and respawn somewhere...