K9999/Story

The King of Fighters 2001
After the death of Krizalid and the disappearance of K', NESTS decided to comb their research for errors. K9999 became the "perfected" 9999th Kyo Kusanagi clone. Built from the ground up, K9999 wielded an exorbitant amount of power. Like K', he was given a special glove that helps him control his shapeshifting powers and keep them from going berserk.

Prior to the 2001 tournament, he was tasked to form a team with Foxy, Kula Diamond, and Angel. Their main purpose was to dispatch the rogue creations that had escaped from NESTS's grasp, as well as disposing K', Kyo Kusanagi, and anyone who would get in the cartel's way. K9999 hated the idea of working with Foxy and Kula, due to the former being way to authoritarian for his liking, and the latter being too annoying. He did seem to enjoy working with Angel, as she seems to have the same interests at heart.

Sometime after the tournament's conclusion (when K', Maxima, Whip, and Lin were reaching Igniz via a blimp), K9999 and Angel attack Foxy from behind, fatally injuring her. NESTS base crashed into the ocean, K9999 and Angel escapes via a helicopter. Shortly after this, he discovers that he is a clone himself until after the destruction of the cartel.

While it is implied that Foxy is killed by him and Angel, this ending is considered non-canon. According to the second 2001 novel written by Akihiko Ureshino, he disappears after an encounter with K' and Kula alongside Angel. His current whereabouts and fate are unknown.