To fight Akuma, make sure your score is less than 500,000 when you meet M.Bison
At the character select screen, go to Ryu for 2 seconds.
Then go to T-hawk for 2 second.
Then go to Guile for 2 seconds.
Then go to Cammy for 2 seconds.
Then return to Ryu, wait 2 seconds, then press Jab.
Play As Akuma
Select the Versus mode and set the speed. when you select a character, simultaneously press A, B, C, L, R, and P. Hold down these buttons until your opponent has selected their character. Akuma's silhouette appears on the Stage Select screen. On the Result screen Akuma's record is listed under the name "Gouki."
When playing a one-player game don't use any continues. When you get up to Bison, Akuma will come out and fight you.
Turn on the game and wait until you see the first profile of a fighter.
On Controller 2, hold the L and R Buttons for as long as you would like to look at the profiles.
when you choose your player, keep the button pressed for a few seconds.
Group Battle Trick
Select Group Battle to go to the Battle Mode Select screen.
On Controller 2, press L, R, L, R, L, R, R, L. This lets you fight with any character you wish up to eight times instead of only twice.