Successfully complete both the Capcom and SNK Grooves in arcade mode with "Normal" Ryu and "Normal" Iori. Secrets 34 ("Evil" Ryu) and 49 ("Evil" Iori) will now be available for purchase in the secret shop. They cost 7,000 vs. points each. To play as the "Evil" version of one of those characters after they are purchased, hold Start and press A, B, X, or Y while that character is highlighted at the character selection screen.