EX-M.Bison
Finish the arcade mode once. Then, on the selection screen character hold Select selecting Bison (Balrog in the US).
Final Vega
Finish the arcade mode once. Then, on the selection screen character hold Select selecting Vega (Bison in the US). Attention, Final Vega is not playable in all modes of play
Shin Gouki
Finish the arcade mode with Evil Ryu once. Then, on the selection screen character hold Select selecting Gouki.
To combat Shin Akuma as a boss end, press L and R at the same time when you select the mode Final Battle.
After completing 100 Kumite with a perfect score, hold L + R + Select while choosing the method Dramatic Battle, and select a character. If you successfully complete this mode very difficult, you will receive the auto-garde ism-plus unlimited.