Black Jewel
The Black Jewel is an evil treasure that Wario collected, in the game, Wario World. It kicked Wario out of his castle, turned all his treasures into monsters, and turned his castle into a strange world. Wario had to embark on a quest to get back his castle and treasures. The Black Jewel only awoke on an evening were a red moon rose. It wiped out all civilization long ago and returned. But little did The Black Jewel know that Wario had beaten every boss of the other worlds and was coming for it. Then after finishing The Black Jewel, Wario reclaimed his castle and treasures and lived happily ever after.
As a boss, the Black Jewel has three attacks. The first one is using it's eye to fire a laser creating a wall of fire. The Black Jewel will use this attack until Wario is trapped between 2 walls of fire narrow enough. If the space is very narrow, the Black Jewel will fire shockwaves across the floor which will have to be jumped. If Wario is not between the firewalls by going through in pain, the shockwaves can still hurt. If the firewalls are not very narrow, the Black Jewel will fire fireballs, which are easy to dodge if very close to the Black Jewel.
To defeat the Black Jewel, free the 5 Spritelings on the battlefield and the Black Jewel will be dizzy. Wario must pick him up and throw him, spin him or wham him. The Black Jewel has 8 HP.