Captain Skull
Captain Skull is an undead pirate that appears in Wario World. Being the last of the game's four major bosses, he holds the last Giant Treasure Chest Key and is the last boss before the final boss. He has a large gun for one arm and an grappling hook for the other arm. The hook can be used to get Captain Skull to another part of the arena with ease.
Wario battles him on a wrecked pirate ship that is broken into two parts. Each half has a main deck and a crow's nest. On both halves, a spring is there to catapult Wario high up to the crow's nest. (Wario can also manually climb there via a ladder) The two halves of the ship are separated by dangerous water, but fortunately, a stone slab at the base of the arena can be used to cross, though it is easier to just use the energy springs.
Being the second-to-last boss, he has quite a dangerous selection of attacks. Captain Skull may fire multiple flaming cannonballs at Wario from the cannon on his arm. The cannonballs pose a danger even after they've cooled, as they can still explode a few seconds later. Captain Skull can also shoot large blue beams at Wario, as well as his dangerous pink energy balls that home in on the anti-hero. If he charges energy into his cannon, Captain Skull will launch a gigantic cannonball that makes a huge explosion on impact. Wario should be on the crow's nest if Captain Skull aims for the main deck and vice versa. Finally, Captain Skull's only close-range attack is a lunge at Wario that leaves him stunned long enough for the captain to make a getaway(but he won't use this attack until he only has 2 HP left)
To defeat this boss, wait for him to fire cannonballs at Wario; these cannonballs can be tossed back at the pirate captain, rendering him unconcious and vulnerable to one of Wario's Mad Moves. A much quicker and easier way to KO the boss is to bounce off one of the energy springs towards him, and to just punch him. He'll get dazed and Wario can use a powerful move to knock off a health skull. Once Captain Skull has been damaged enough, with only two health skulls left, he'll become invincible to Wario's punches. The only thing that can hit him now are his own cannonballs. Wario should jump to the other half of the ship, dodging his attacks. When he starts flinging cannonballs, grab one, Power Throw it his way, and leap over to the dazed boss. Do a Piledriver, Power Throw, or Wild Swing-Ding to knock out another health skull. Repeat once more to finish the boss.
When Captain Skull is done for, Wario receives the fourth and final Giant Treasure Chest Key.
Another way to knock out Captain Skull is to simply pick up a barrel (before Captain Skull blows them up with his explosion attack) and smack him with it.
