Kamikazee is a move that can be used when the Dragon Quest Hero uses his Down Special Move, Command Selection. When it is used, the Hero crosses his arms and then releases a blast of fire, dealing massive damage and knockback. The Hero will always die when using this technique, so doing so is very dangerous, especially if his stocks are low. If performed in a 1v1 match, when all players have one stock, Hero gets KO'ed first, resulting in losing a match to his opponent.
Origin
Kamikazee's name is a clue to the spell's effect. As its name (which is a pun on Kamikaze) implies, it involves destroying all enemies at the cost of the caster's life (hence the Hero's chance to immediately die). It first appeared in Dragon Quest II, and is often cast by NPC characters and enemies.