Wario Waft becomes more powerful as time passes, ranging from a tiny "poot" to a massive explosion (which has high knockback and damage). At half-charge, it is his fastest and strongest KO move, activating in only 3 frames when half-charged, which is incredibly fast for a very powerful move. It was first revealed in the E3 2006 trailer for Super Smash Bros. Brawl, albeit with it creating a much larger explosion than the one in the game. It takes nearly 1 minute and 50 seconds for it to charge completely, with a full charge indicated by Wario flashing orange. Wario Waft is one of only two chargeable attacks whose charge is retained even after the user is KO'd, the other one being Oil Panic.
In Brawl, a fully charged Wario Waft does 42% damage (40% plus 2% for being fresh) and rockets him high into the air with nearly unrivaled altitude, making it a powerful recovery. However, it's possible to self-destruct if Wario flies across the top blast line when performing this move with a full charge. As Wario-Man, it deals 50% damage if fully charged, and even when it is not at full charge, it can potentially make one-hit KOs under normal circumstances. Even if Wario doesn't connect with a fully-charged blast, he can still run into characters while being launched to deal approximately half damage and strong vertical knockback. It works well after an up throw set up or as an edgeguarding attack. In addition, a fully charged Wario Waft has armor.
A half-charged Wario Waft (a waft held for at least 1 minute, but not fully charged, up to 1 minute 45 seconds) actually deals more knockback than a fully-charged waft. Thus, it is often more practical for a player to release the waft before it gets fully charged, in order to secure an earlier KO.
In Smash 4, the Wario Waft retains most of its properties; however, damage and knockback from the fully charged variant has been altered. The maximum charged Waft now deals 27% damage instead of to 42% (along with less height gained), but now possesses far more knockback, being able to KO characters from the center of the stage at just 60%. The charge time can also be decreased by eating items with Chomp, but it still self-destructs Wario at the upper blast line.
Wario's weakest "poot" (which is the uncharged Waft) deals no damage, but it does knock most foes off their feet, and if performed as Wario-Man, it stuns opponents. After the uncharged Waft, Wario will face the screen and sheepishly laugh while scratching his head.
The move is based on Wario's scatological personality and his general love for toilet humor as seen in numerous game manuals and promotional websites for many of his games, mainly for the Japanese market, as the Western market usually leaves out this trait of Wario's personality. One of the first instances concerning Wario and farting is the Japanese manual for Wario Land II, where Wario mentions that his Hot Wario reaction was not produced "because his fart caught on fire". However, farting would not be part of the actual Wario games until the WarioWare: Smooth Moves microgame He Who Smelt It..., where Wario is seen constantly farting, forcing the player to waft the air by waving the Wii Remote side-to-side to win the game. Wario Waft later makes an appearance as Wario's skill in Mario & Sonic at the Olympic Winter Games.
Special move customization was added in Super Smash Bros. 4. These are the variations: