The Gladiator Cheats

Ranking mode:
Press D, D, D, B, B, B at the mode selection screen. You will hear a sound if you have entered the code correctly.

Additional ranking mode skills:
Enable the "Ranking mode" code, then press B, D, C, D, B, C, B at the mode selection screen. You will hear a sound if you have entered the code correctly.

Alternate challenge mode:
Press B, C, B, C, B, C at the mode selection screen to face more Bosses in challenge mode. You will hear a sound if you have entered the code correctly.

Or push B, C(4), B at the mode selection screen. You will hear a sound if you have entered the code correctly.