DR. MARIO 64 CHEAT CODES
None.
DR. MARIO 64 TIPS & TRICKS
Super hard difficulty
Pick story mode, highlight the "Hard" difficulty, then press Z.
Expert mode
Pick versus mode, highlight a CPU player, then hold L and press A (for Hard difficulty) or B (for Super hard difficulty).
More viruses
Press L or R in marathon mode to increase the number of viruses.
Metal Mario
Finish story mode as Wario under the normal, hard, or super hard difficulty without losing or using the redo option. Defeat Metal Mario without losing to unlock him in versus mode.
Vampire Wario
Finish story mode as Dr. Mario under the normal, hard, or super hard difficulty without losing or using the redo option. Defeat Vampire Wario without losing to unlock him Mario in versus mode.
DR. MARIO 64 UNLOCKABLES
None.