The following are known Action Replay Codes for Phantasy Star Online on SEGA Dreamcast.
Master Code – Must Be On
1EBF9758C0705040
Save to a Different Memory Card
154C151700000018
1234151600000008
1264151600000018
Master Code – Must Be On
1EBF9758C0705040
Save to a Different Memory Card
154C151700000018
1234151600000008
1264151600000018