Why is Joey all black?

Migratory birds have a vast sky, and Joe has experienced too much, so his dark side is bigger than anyone else, not as simple as GG Bond.

There is a character named Joy Light in GG bond's guardian. He is a powerful guardian of the Five Spirits. He sacrificed himself to save the fairy tale world, and he was released from the guardian of light. The super man released Joey and evil at the same time, so the guardians of light launched a battle between justice and evil, and the joy of light was the right side.