Play as Dan
At the title screen, hold Start and press Down, Left(7), then any button to unlock Dan.

Play as Demitri
At the title screen, hold Start and press Right(3), Left, Up, Right, Down, Up, then any button to unlock Demitri.

Play as Evil Iori
At the title screen, hold Start and press Up(3), Down, Left, Right, Down, Left to unlock Evil Iori.

Play as Geese
At the title screen, hold Start and press Left(3), Down, Left, Up, Right, Up to unlock Geese.

Play as Goenitz
At the title screen, hold Start and press Down(3), Right, Down, Left(3) to unlock Goenitz.

Play as Mars Alien
At the title screen, hold Start and press Up, Down, Right(3), Up, Down, Left(2), Down, then any button to unlock Mars Alien.

Play as Red Demon
Enter survival mode. Defeat the opponents until you face the Red Demon. Defeat him to unlock him as a selectable character in all modes. To choose the Red Demon, highlight Tabasa at the character selection screen, then hold R and press X, Y, A or B. Note: The Red Demon is one of the best fighters in the game.

Play as Shin Mr.Karate
At the character selection screen, highlight Kasumi, then hold R.

Play as Super Akuma/Shin Gouki
At the character selection screen, highlight Balrog, then hold R.

Play as Violent Ken
At the title screen, hold Start and press Up(2), Down, Left(2), Right, Left, Up, then any button to unlock Violent Ken.

Play as Young Athena
Enter survival mode. Defeat the opponents until you face Athena. Defeat her to unlock her as a selectable character in all modes. To choose Young Athena, highlight Genjuro at the character selection screen, then hold R and press X, Y, A or B. Note: Athena is one of the best fighters in the game.

Play as Zero
At the title screen, hold Start and press Up, Right(2), Left(2), Down, Up(3), then any button to unlock Zero.