Extra Create-A-Player Bodies
To activate extra body selections in create a player, Beat the game on it's hardest difficulty. Then on the main menu choose "Create Player" and switch the bodies. For the man there will be a silver Buda looking thing. For the woman there will be a character much like Dural from Virtua Fighter.

Gouriki
From the title screen, press Up, Up, Down, Down, Left, Right, Left, Right, B, A, then Start.

Reiji
From the title screen, press A, B, Right, Left, Right, Left, Down, Down, Up, Up.

Alternate Outfits
Before selecting your player, hold the L button and press left or right on the digital pad. The rotating character pictures will change color indicating the trick worked. Keep holding L and select your character.