The Cape is a boss from Final Fantasy Crystal Chronicles: Ring of Fates. It is only fought in the battle against Galdes, and is only a target once Galdes throws it up into the air for his strongest attack.
On its own, the Cape has no attacks and is only used through Galdes to damage everyone on the main platform. If it is destroyed before it returns to Galdes, then it will never be used again. If the player were to defeat Galdes before the Cape hits the ground, then the Cape will remain on the battlefield until either destroyed or the player leaves. If destroyed, it drops magicite for the player to use.