Fire Shell (move)
From the Super Mario Wiki
This article is about an attack used by Kooper in Paper Mario. For information about Bowser's armor in Super Mario RPG: Legend of the Seven Stars, see here.
Fire Shell is Kooper's ultimate attack in Paper Mario. It can only be used by leveling Kooper to the Ultra Rank. To use this move the player must expend five FP and then repeatedly tilt the control stick to the left to fill the gauge. All ground based enemies will be hit by a fiery attack. It can cause up to five points of damage. It works especially well on icy enemies.
