Mario
Mario uses many items, which give him various powers. The one that shows up the most often is the "Super Mushroom", which allows Mario to grow to twice his size, becoming "Super Mario" (after the name of the series), and can take a hit before shrinking back down to "regular" Mario. If "Super Mario" collects a "Fire Flower", he will transform into "Fire Mario", who can throw fireballs at enemies. Picking up a "Star" makes it so nothing can hurt Mario for several seconds.