Press Down, while having Hsien-Ko highlighted on the player select screen, to reveal Akuma.
Classic Battle Master (10 points)
Complete X Arcade Mode on Hard or Expert Difficulty.
Classic characters
If you entered the code correctly, you will hear a sound. The classic versions do not have super combos and cannot reduce throw damage.
Code
Result
Jab, Right, Left(2), Right, Jab
Classic Balrog
Jab, Left, Right(3), Jab
Classic Blanka
Jab, Up(2), Down(2), Jab
Classic Cammy
Jab, Down(3), Up, Jab
Classic Chun-Li
Jab, Down(2), Up(2), Jab
Classic Dee Jay
Jab, Down, Up(3), Jab
Classic Dhalsim
Jab, Up(3), Down, Jab
Classic E. Honda
Jab, Left(2), Right(2), Jab
Classic Fei Long
Jab, Up, Down(3), Jab
Classic Guile
Jab, Left(3), Right, Jab
Classic Ken
Jab, Down, Up(2), Down, Jab
Classic M. Bison
Jab, Right(3), Left, Jab
Classic Ryu
Jab, Up, Down(3), Up, Jab
Classic Sagat
Jab, Right(2), Left(2), Jab
Classic T. Hawk
Jab, Left, Right(2), Left, Jab
Classic Vega
Jab, Left, Right(3), Jab
Classic Zangief
Dan Hibiki
Press Down, while having Donovan highlighted on the player select screen, to reveal Dan.
Evilot
Press Down, while having Morrigan highlighted on the player select screen, to reveal Evilot (Devilot in japan). She is from the Capcom fighting game "Cyberbots".
Fight against Akuma
The way to fight Akuma is the same as it was in the original game. You must not continue, and you must defeat all opponents before M. Bison within 20 minutes or less. When you fight Bison, Akuma will appear, perform the Shun Goku Satsu on Bison, and fight you.
Get Your Feet Wet (7 points)
Win three Ranked Matches of X or X' Mode.
Meeting People is Easy (7 points)
You joined or hosted a Four Player Match.
Modern Battle Master (10 points)
Complete X' Arcade Mode on Hard or Expert Difficulty.
Playing as Akuma on Classic Mode
For all classic modes, selecting Akuma is the same as selecting him in the original version. You must highlight these characters for at least 2 seconds in the following order: Ryu, T. Hawk, Guile, Cammy, and Ryu again. Then, after highlighting Ryu for 2 seconds, press Start and all three punch buttons in quick succession. If you did it correctly, Akuma's portrait will replace Ryu's.