Bat Wario

Bat Wario,  also known as Vampire Bat Wario, is one of Wario's many transformations in the Wario Land series of games, appearing in Wario Land 4. It appears in four levels: Crescent Moon Village, Arabian Night, Hotel Horror and Golden Passage.

The Bat Wario transformation can be triggered by coming in contact with a Minicula, causing Wario to become a bat, sporting a pair of pointy fangs, bat wings in place of his arms, an indigo skin tone, and red eyes. This reaction is similar in ability and appearance to the bat form of Vampire Wario, a key difference being that he cannot transform into an actual vampire, unlike in Wario Land 3. To turn into his normal self, he must go into a patch of light or fall into a pool of water (similar to Zombie Wario).

Wario Land 4

 * Nintendo 3DS Ambassador Program digital manual bio: "Press to move and  to fly."

Trivia

 * In WarioWare, Inc.: Mega Party Game$!, Bat Wario cameos in a beginning video, where he chases a pigeon across the screen, and gets chased by a few pigeons back across the screen.
 * Bat Wario's sprite has red overalls instead of purple, but in the artwork and the Japanese commercial, they are purple as usual.