Wario is a unique character, as he is heavy but has some very quick moves. Wario's greatest advantage is his aerial movement speed. His Up+A is a massive clap which has high knockback and heavy damage. His Forward smash, when fully charged, has good knockback as well. However, Wario's main problem is that his attacks all lack range.
Wario's dash attack in the Wario Land games. Wario rams forward powerfully.
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Spinning Head
He spins his head, hitting opponents
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Wario Breakdance
Wario breakdances, damaging opponents with his head. This move hits only once and has a long duration, so if your opponent isn't hit far away, he can and will hit you back.
Wario grabs his opponents in his jaws and chews on them with this attack. He can also eat items with it but eating bombs damage him.
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Wario Bike
He spawns a motorcycle and rides it around. If he falls off, the bike remains and can be picked up and thrown as an item. He can jump from the bike as a recovery tactic off stage and still retain his double jump. He can get back on the bike by performing the move while standing near it, but he can't spawn another bike while the first one is still around. Another Wario can steal your bike and ride it. If you want to get rid of the bike, Wario can use the Chomp move to eat it. Even after a bike is destroyed or launched off the screen, you'll have to wait some time before a new one can be spawned. Tip: If you ride on the motorcycle into a pitfall it does 10-20% so throw any pit-falls away.
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Corkscrew
This is Wario's main recovery maneuver.
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Wario Waft
This move has three phases. The uncharged fart does nothing except occasionally tripping opponents like a banana peel. The almost charged fart has the most knockback. The fully charged fart deals the most damage, as well as helping Wario gain a lot of height, making it useful for recovery.
Wario-Man: Wario transforms into Wario-Man. When he is Wario-Man his standard attack creates a flurry of punches, he is much faster,invincible, and his moves are twice as fast. His Forward Smash slides him across the stage, his Up Smash sucks opponents in, and all his attacks can be interrupted before it ends. His aerials propels himself upwards except his Downwards Air Attack, which sends him downwards. His fully charged Wario Waft Instantly KOs and uncharged Wario Waft paralyses foes. Don't use his Wario Bike though, or you will run off the stage at high speeds, SD'ing yourself.