Guardian
Gabe's Guardian, also known as Xehanort's Guardian, Ansem's Guardian, or even the Shadow of Hatred, is a entity created by the dark energy inside of Gabe. He is invincible, and cannot be killed, due to being made out of pure darkness. He helps Gabe with some of his attacks, and heals him in battle. He cannot talk, but rather uses telepathy to his mater(s) in combat.