Wario Waft

The Wario Waft is Wario's Down Special Move. It becomes more powerful as time passes, ranging from a tiny "poot" to a massive explosion (which has high knockback and damage). It was first revealed in Super Smash Bros. Brawl ' s first trailer, where the move created a large explosion, complete with a mushroom cloud. It seems that the move cannot have such power in the actual game. When the attack is fully charged, Wario will flash orange. This takes almost 2 full minutes(about 1 minute and 49 seconds).

A fully charged Wario Waft from normal Wario does 40% of damage. He also flies into the air a distance that is nearly unrivaled by any other recovery move. However, it's possible to self-destruct if Wario flies off the top of the Blast Line from performing this move fully charged. While he's Wario-Man, the Wario Waft can do 50% of damage if fully charged, and even if it isn't charged up, it has unimaginable power, and is a One-Hit KO. If Wario turns into Wario-Man and eats a Super Mushroom during a Giant Special Brawl, a fully charged Wario Waft is capable of dealing 140% damage.

A small fart deals 11% with minor knockback and a more charged but not fully charged Wario Waft deals 23% with considerable knockback, enough to KO most high damage opponents.

Wario's weakest "poot" knocks foes off their feet. If performed as Wario-Man, it stuns opponents.

Origin
The move is loosely based on a minigame in Warioware Smooth Moves where Wario farts briefly but it doesn't create an explosion. Wario also farts in the game Super Mario Strikers Charged as his special move. However, Mario Strikers Charged was announced after Brawl yet released a year before Brawl was released. It's possible that his move in Mario Strikers Charged comes from this game, except the gas in this game is green and not exactly an explosion.