Ready 2 Rumble Boxing: Round 2
Dreamcast

Cheat Mode:

Go to the character select screen and press Left, Right, Left, Left, Right, Up, Down, R(5times), L.

All Characters:

Go to the character select screen and press Left, Left, Right, L, Left, Right, Right, R, R, L.

Undead Boxer:

Go to the character select screen and press Left, Up, Right, Down, R, R, L.

Full First Level Rumble Meter:

Pause game play, then press R, L, Down, Up, Up, Left, R, R, R, L.

Full 2nd Level Rumble Meter:

Pause game play, then press R, R, L, Down, Up, Up, Left, R, R, R, R, L.