Puffy Wario

Puffy Wario is one of Wario's many transformations in the Wario Land series of games. To achieve this transformation, Wario must be either stung by a bee enemy, like a Bee from Wario Land II, a Beezley from Wario Land 4 (showing that Wario may be allergic to bees), get stung by a Jellybob (Wario Land 3), get hit by the arrow that is shot by a Bow Balloon, or get hit by the minions of the boss Catbat (Both in Wario Land 4).

He will then swell up, filling his head with air, allowing him to slowly float upward like Kirby. This is usually used to get up to a high place, or as a form of annoyance, because in the level Wildflower Fields in Wario Land 4, there is an area with spikes at on the ceiling, with hard to avoid Beezleys nearby. So when Wario unintentionally floats up, he will get hurt by the spikes.

When Wario hits against a ceiling, gets hurt, or is unable to continue to float up for any reason, he will turn back to his normal form and go back onto the ground.

Trivia

 * Puffy Wario was one of three Wario transformations appearing in Densetsu no Stafy 3, along with Flaming Wario and Bubble Wario in Wario's guest appearance in Undersea Ruins.