Captain Skull is a skeletal pirate boss featured in Wario World. He is the overall boss of the fourth world, Sparkle Land, and the penultimate boss fought before Black Jewel.

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Main characters	Main characters	Wario • Black Jewel
Enemies	Enemies	Angler Mangler • Ankiron • Barrel Buster • Big Bone-Fist • Big Scorper • Bone Cractyl • Cage Beast • Circus Ankiron • Clown • Club Mummy • Clubosaur • Cobra • Cractyl • Crystal Creature • Crystal Entity • Door Spirit • Electric Clown Fence • Elephant • Enemy generator • Fattington • Flying Spade • Freeze Cannon • Gatorbaby • Grizzly • Hawk • Haipō • Hōhō • Ice Ankiron • Icicle Mite • Jokey Ship • Laser Jigglefish • Magician • Magon • Masked Clubber • Miitī • Monstrous Magnet • Mouse • Mummy • Mummy Ankiron • Ninja Crow • Old Red-Mug • Pigeon • Polar Bear • Ram • Rhino Ankiron • Silver Door Spirit • Skeletal Ankiron • Skelosaur • Sled Creature • Snake charmer • Snow Bomber • Snowman • Stingray • Stone-Cold Statue • Stuffed Ankiron • Swordfish • Terrible Portrait • Tree Freak • Tulipatooie • Turtle • Unithorn • Wind Winder • Witch • Wolf • Zombie Magon
Bosses	Major	DinoMighty • Dual Dragon • Red-Brief J • Captain Skull • Black Jewel
	Minor	Greenfist • Sandworm • Brawl Doll • Clown-a-Round • Winter Windster • Spideraticus • Mean Emcee • Ironsider
Worlds	Worlds	Excitement Central • Spooktastic World • Thrillsville • Sparkle Land
Levels	Levels	Greenhorn Forest • Greenhorn Ruins • Horror Manor • Wonky Circus • Shivering Mountains • Beanstalk Way • Mirror Mansion • Pecan Sands
Other locations		Treasure Square • Unithorn's Lair • Wario Castle
Collectibles	Collectibles	Coin • Garlic • Huge Treasure Chest Key • Mr. Wario's Golden Statue • Red diamond • Spriteling • Treasure
Objects	Objects	Arrow Block • Barrel • Battle Ring • Bomb • Bunny Spring • ByeBye Balloon • Clown missile • Column • Crate • Cyclone Generator • Drop Block • Escape Spring • Garlic Dispenser • Glue Globe • Marshmallow Block • Missile cannon • Mr. Wario's Golden Statue • Rock Block • Spiked ball • Statue • Stone Doohickey • Swirly Slab • Swirly Spinner • Trapdoor • Treasure button • Treasure chest • Wooden chest
Wario's moves	Wario's moves	Corkscrew Conk • Dash Attack • Ground Pound • Hyper Suction • Jump • Mad Move (Mega Toss • Piledriver • Wild Swing-Ding) • Power Throw • Wario Punch