Chaos

Chaos is a mutated chao that has the power of the Master Emerald within him. Once he absorbs all seven Chaos Emeralds, he becomes the dreaded Perfect Chaos. Chaos was a very loving and gentle creature until Pachacamac and his soldiers tried to use the power of Chaos Emeralds to overcome their enemies. Eggman managed to track Chaos' energy, bring him back to life, and get him to achieve his aggressive final form, which eventually backfired at him. Tikal is Chaos' best friend, and they live joyfully with the chao in their realm.