Door Spirit

From the Super Mario Wiki

Door Spirits are living, golden-colored door knockers in the Wario World level, Horror Manor. They look a small bit like Bowser and shoot bolts of electricity, from their open mouths, at Wario. Wario cannot pass through the door until he beats them first.

There are also Silver Door Spirits which are stronger than regular Door Spirits.

Wario World
Wario's Moves	Corkscrew Conk • Dash Attack • Ground Pound • Hyper Suction • Jump • Power Throw • Piledriver • Wario Punch • Wild Swing-Ding
Major Bosses	Dinomighty • Dual Dragon • Red-Brief J • Captain Skull • Black Jewel
Minor Bosses	Greenfist • SandWorm • Brawl Doll • Clown-a-Round • Winter Windster • Spideraticus • Mean Emcee • Ironsider
Worlds	Excitement Central • Spooktastic World • Thrillsville • Sparkle Land
Levels	Greenhorn Forest • Greenhorn Ruins • Horror Manor • Wonky Circus • Shivering Mountains • Beanstalk Way • Mirror Mansion • Pecan Sands
Collectibles	Coin • Garlic • Mr. Wario's Golden Statue • Red Diamond • Spriteling • Wario's Treasures
Objects	Arrow Block • Battle Ring • Bunny Spring • ByeBye Balloon • Column • Drop Block • Escape Spring • Garlic Dispenser • Glue Globe • Marshmallow Block • Rock Block • Sculpture • Smiley Bomb • Swirly Slab • Swirly Spinner • Treasure Button • Wooden Chest
Enemies	Angler Mangler • Ankiron • Big Bone-Fist • Big Scorper • Cage Beast • Clubosaur • Cobra • Cractyl • Crystal Entity • Door Spirit • Electric Clown Fence • Elephant • Fattington • Flying Spade • Freeze Cannon • Icicle Mite • Laser Jigglefish • Magician • Magon • Monstrous Magnet • Ninja Crow • Old Red-Mug • Ram • Silver Door Spirit • Stone-Cold Statue • Stone Doohickey • Swordfish • Terrible Portrait • Tree Freak • Unithorn • Wind Winder • Witch