Penguins

From HallsWiki

Most people know penguins as the intrepid, flightless, and tuxedoed birds that inhabit Antarctica and have starred in numerous recent films. On Halls Isle, however, penguins are green and trained as the Tyrant's elite honor guard. When the Fortress of Ineptitude came under siege during the Zero Halls crisis, the penguins held off an army of chao long enough for the Hallsians to save the day.

Their numbers greatly reduced in the battle, and the Fortress ultimately abandoned, the penguins have gone into a state of semi-retirement as they breed and train their young in the ways of combat. It is likely that the next time the Halls faces a threat as grave as the one presented during Zero Halls, the penguins will come to arms once more.