Wario Bug

The Wario Bug is the main antagonist of WarioWare: Get It Together! He is the boss of the level Anything Goes. He takes on the appearance of Wario's head (albeit purple with red eyes) wearing a crown and surrounded by two disembodied hands that allow him to attack.

In the intro cutscene to Anything Goes, Wario is surrounded and infected by game bugs as he falls down a bottomless pit, turning him into the Wario Bug. He spews out game bugs from his crown, turning his skin purple. He then transforms into a form consisting of a giant head and disembodied hands. Between microgames, the Wario Bug may attempt to crush the player's character with his hands or spit out flying nose-like bombs. If he hits the player with his fist or the player is caught in a nose bomb's explosion, they lose a life. To defeat him, the player must complete Potty Pursuit, then plug his giant nose. Once the Wario Bug's nose is plugged, it explodes and the Mega Bug falls out. After the crew jump out of the stage, the Wario on the screen to Anything Goes gets replaced by the Wario Bug. On repeat playthroughs of Anything Goes, the Wario Bug turns blue after playing Potty Pursuit once and turns green after playing it twice.

Trivia

 * If two players beat Potty Pursuit, they both must plug a single nostril of the Wario Bug's nose. However, if the game is beaten in single player, a cork, watermelon, or globe will bounce from offscreen and plug the left nostril, leaving the player to plug the right one.