The using pokemon will faint immeadiately upon using this move.
In addition, the base power listed above is deceptive. While this is indeed the value that is plugged into the standard damage formula by the game, at the same time it will cause the opposing pokemon's Defense stat to be half of what it would be when applying the damage for this attack. Therefore, the base damage for this attack ends up actually be equivalent to 400.
Selfdestruct is affected by Brightpowder when the opposing pokémon is equipped with it.