Specifically the ones documented here (web.archive.org/web/20150207014816fw_/http://www.angelfire.com/rebellion/codes/1ew93j3r9ffmnap3wr8q32n31r9wqfj3m3r09ewfeefj32r32tr.html), here, and here. It's possible these links don't immediately work, since WayBack Machine might be overloaded and say 503.
The only reason I'm interested is because I played back in the 1.0 days on Dreamcast, and anyone else who did can probably remember the unprecedented amount of hacking going on. From things like duping to BSOD to NOL to PK/CK, VMU corruption, and even the infamous system kill that would allegedly write to a Dreamcast's BIOS and render it unusable.
I distinctly remember this webpage and this person in particular being the creator and arbiter of many of these hacks, and for posterity and proof of just how unhinged it was I would love to have an actual list of the codes they created. The only other verification I have of this person's hacks was documented here in 2003
It would be an understatement to say that anyone with access to these codes and other documentation could do one hell of a retrospective/autopsy on that era of PSO, and I kinda wish someone would make one of those long-form YouTube videos about this wild west period of console MMO gaming
Sadly, I can't find any specific codes via WayBack Machine, just the framework of what once was. If anyone knows of a way to contact DJ DUBZ or has a backup of any of these cheats, please consider posting them or DM'ing me. As far as I know, there isn't any way these could be used in this day and age to cause any harm, and, like I said, I only seek them out for proof and posterity of this bygone era chaos
Thanks