Hi here it is the Mini FAQ:BY AKUMA
Arcade.
Mini-FAQ for 3 Characters
Akuma, Ryu and Ken For
Street Fighter 3:2nd Impact
Akuma: Code: Enable Akuma:
Go to TEST MENU, go to CONFIGURATION, then GAME SETTING
then on 1st player, 
At TIMER press start x 3
At EVENT (?)      Press MK x 2
At SCREENMODE press HK x 3
At BONUS GAME press start x 1
At DAMAGE press LK x 4

If success, there will be a " hmm! " sound. Gouki will be selectable by 
default.
Moves:
Hadoken: QCF+P (G/A)
Gou-Hadoken: HCB+P (G)
Shouryuken: F, D, DF+P (G)
Hurricane kick: QCB+K (G/A)
Teleport: F, D, DF+3P OR 3K(G)
Supers:
Messatsu-Gou-Hadoken: QCF X2+P (G/A)
Messatsu-Gou-Shouryu: QCF X2+P (G)
Messatsu-Gou-Rasen: QCF X2+K (G/A)
Shun-Goku-Satsu: LP, LP, F, LK, HP (G/A)

Ryu:
Hadoken: QCF+P (G)
Shouryuken: F, D, DF+P (G)
Hurricane kick: QCB+K (G/A)
Forward Kick: HCF+K (G)
Supers:
Shinkuu Hadoken: QCF X2+P
Shin Shouryuken: QCF X2+P
Denjin Hadoken: QCF X2+HOLD P

Ken:
Hadoken: QCF+P (G)
Shouryuken: F, D, DF+P (G)
Hurricane Kick: QCB+K (G/A)
Supers:
Shouryu-Reppa: QCF X2+P
Shinryuken: QCF X2+K
Shinpuu-Jinraikyaku: QCF X2+K
Thats it bye

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