Once I win a battle against a Dry Bones, he collapses. But after a few minutes, he'll get back up and I'll have to fight him again. How can I kill a Dry Bones so that he stays dead?
The only thing I noticed in regards to Dry Bones is that in certain rooms it is dark when you enter, and the Dry Bones are dead on the floor. As soon as you turn on the lights (by hitting the lamps from underneath) they wake up.
However, when I turned the lights out again they did not die, nor stay dead when killed. It's possible that they only stay dead if the lights are out when you enter a room.