UPDATED
http://www.smashbros.com/en_us/characters/wario.html#2nd
WARIO'S MOVES
<Side Special Move: Wario Chopper>
Warios side special move is the Wario Chopper. He jumps on and starts racing!
Vroom! Vroom!
Tilt the Control Stick in the opposite direction of your movement to pull a 180. Use an attack button to jump off.
Axle turn!
Only one motorcycle will appear on screen, so if you fall off, run back up to it and climb on again.
Wheres my hog?!
<Down Special Move: Wario Waft>
Oh, and Warios down special move is the Wario Waft. That is to say, he passes gas.
This particular special move builds up power the longer you go without using it.
If you havent held it in, itll be a cute little poot.
But when you hold it in as much as you can...?!
In this case, patience really is a virtue.