Sunshine first showed up as one of the Devil Knights, a crew of Akuma Choujin accused of snatching the Golden Mask—a sacred artifact from planet Kinniku that used to be a god's actual head. During the Five Story Ring battle inside Warsman's unconscious mind, he went up against Geronimo and came dangerously close to killing him. He got taken down by Geronimo's Apache War Cry after his obvious weakness—sensitivity to loud noise—was exposed. Like the other Devil Knights, he eventually got absorbed into Akuma Shogun before things escalated with Kinnikuman.
Later, Sunshine and Ashuraman escaped and cooked up a scheme to steal the Seigi Choujins' Friendship Power using Cursed Dolls. They tested this plan during the Dream Tag Tournament as the Stray Devil Choujin Combo, but lost to Kinnikuman and Kinnikuman Great in the semis. The loss actually turned them good—or at least, that's what seemed to happen before Neptuneman killed Sunshine outright. He made one more appearance during the Survivor Match for the Kinniku Throne, this time as one of the Choujins that Omegaman had murdered and could therefore copy.
In *Kinnikuman: Nisei*, Sunshine became a founding member of the dMp and basically ran their Akuma Choujin division. He sent his trainees Rex King and Check Mate to fight the new Seigi Choujin generation, and his respect for them ended up growing enough that he blew up the dMp headquarters. He shows up again during the Demon Seed Arc backing Ashuraman.
Content compiled by AnimeList.moe from publicly available sources.
