Kurix and the "Chain of Memories" Riku Replica go on a crazy tour of the Final Fantasy worlds, and end up in a gambling hall with Late-Teenaged Seifer and Reno thoroughly insisting that they have a system. The existence of Reno is a necessity in the Kingdom Hearts world, as after all, Axel is Reno's Nobody.

I had Reaction Commands worked out for them, too; no, wait, I'd stolen existing Reaction Commands. Saionji's Nobody had Duel Stance. Vixorel was basically just Xigbar all over again.