Starman

Starman
"STAR!" - Luigi, in Super Mario Galaxy.

Techniques
Star renders you invincible. It also instakills overworld enemies if used on the field.

Level Advantages

 * After 3-2: Use it to get rid of the Ice Bros.
 * After 5-G and dying in 5-5: Use it to get rid of the Piranha Plants.

Problems with Starman Advantages
You can't run through instakill lava or acid.