How does the move 'Explosion' work?

Question

Please explain -_-

Comments

It explodes :D

Answer 1

The Pokemon explodes, sacraficing itself, while causing major damage to everyone out on the feild that doesnt resist or is immune to it. Its that simple.

Answer 2

In old generation(before 5) it would calculate damage by taking halve the defense and doing damage. It doesn't lower the defense stat. If you want a good user, fortress with a normal gem. Fortress can learn all entry hazards: spikes,toxic spikes, and stealth rocks. Although a rapid spinner could ruin all the hard work.