From this site.Serial number delete:
This trick is best used when you want piece and quiet. Load the game, then click on "Dressing Room". Press the power button on your Dreamcast. When you turn the Dreamcast on again and load up your character, the game will ask you to re-enter your serial number and access key. This has a few advantages. Anyone with your card will not be able to find you. Your wins and disconnects in battle mode will be gone.
As well as;
From this site. (for resetting the dreamcasts internal memory).(Yo)u can resest the memory on the dc, just plug in one controller in the port "(C)b" slot, insert the web browser, then hold x and b on the controller, then turn it on, then wait until the dc is done booting up, then your dc memory should be erased
I was wanting a way to share characters, and have no idea how that can be done with the serial/code restrictions on everyones systems (if you use a legit disc more often as I do).
I know that somehow, it's been done, but I'm not too sure...
This is so I can share my legit mags & s-rank library I'm building.
I'm not willing to test the first idea with anything but a backup, as that sounds...fishy.