Throw a powerful Pac-Man like scissor that returns to you. You can easily defeat weapon based/electrical enemies with 1 hit.

Shoot 2 waves of fire that hit multiple enemies and pass through walls and sublimate ice cubes. Icy surfaces will heat up and melt into water. Stand on ice cubes to melt them too. Can kill weapon based enemies.

I should edit the head, but anyways, you shoot an oil blob and get on it and skateboard into enemies. You are invincible while doing this, hopefully finding a place with fried chicken and watermelon Kool Aid. Actually you're Mario, so you'll probably head to an Italian restaurant instead.

Fire 3 tornadoes at 1 time on the screen that arc. Use the tornadoes as an alternative to blowing on the microphone built in the console. Bowser will need a giant sack of leaves if he wants to beat Air Mario. You can also blow away enemies made of metal and send projectiles back to them for damage. Fire enemies die in 2 hits.

Swim in any direction underwater and fire bubbles that crawl on land and bounce in water. Destroys fire based enemies in 1 hit.

Fire a rapid barrage of grapes in 7 directions. You are immobilized while firing and can't charge, so be wary of this. Unlike lemons, grapes cannot go through walls, but you can dash to dodge projectiles and pass through small enough spaces. A dash jump allows you to jump faster and higher.