Super Smash Bros. Lore!

This is not official, it's some weird stuff made up by me and my friends

Pit / Dark Pit

Pit is an angel of Kirby used for menial tasks such as serving Kirby his food and providing entertainment. However, Pit has a separate manifestation of his darker thoughts that first appeared after Pit went into depression from his service to Kirby. This split caused a version of Pit that likes Kirby and serves him, and an emo version of him (Dark Pit, obviously) that embodies all of the depression and hatred that Pit felt. This led to Dark Pit joining Jigglypuff in the Nine Hells, and further balanced the Three Heavens and Nine Hells. Dark Pit now resides in the 7th hell, the Pit.