Zero
Hold Start and press Up, Rightx2, Leftx2, Down, Upx3, then any button at the title screen.
Violent Ken
Hold Start and press Upx2, Down, Leftx2, Right, Left, Up, then any button at the title screen.
Dan
Hold Start and press Down, Leftx7, then any button at the title screen.
Evil Iori
Hold Start and press Upx3, Down, Left, Right, Down, Left at the title screen.
Mars Alien
Hold Start and press Up, Down, Rightx3, Up, Down, Leftx2, Down, then any button at the title screen.
Unlock Fighters
Hold the R button over certain fighters:
Ryu unlocks Zero
Chun Li unlocks Demitai
Dhalsim unlocks Dan
Bison unlocks V. Ken
Vega unlocks Shin Akuma
Kyo unlocks Geese
Terry unlocks Mars People
Ryo unlocks Goenitz
Kim unlocks B. Iori
Katsumi unlocks E. Mr. Katate
Two Hidden Bosses
Simply beat 35 fighters in survival to unlock Athena and beat 36 Fighters to unlock Red Arremer. Then hold the R button over Tessa to use Red Arremer and hold the R button over Genjyuro to use Athena.
Geese
Hold Start and press Leftx3, Down, Left, Up, Right, Up at the title screen.
Goenitz
Hold Start and press Downx3, Right, Down, Leftx3 at the title screen.
Demitri
Hold Start and press Rightx3, Left, Up, Right, Down, Up, then any button at the title screen.
