Yes General- when you hit 99 in the original game, you would actually level back down to the 40-50 range, even though the game would say you were at 99. As a result, you would get stat decreases, you could get skills and techs you aren't supposed to be able to get, and it's generally a weird and wonky glitch. For the most part, you'd never see it, and it isn't really worth going after.

So did the original game have some problem when you got to lvl 99?

Level 99 Stat fix for Phantasy Star IV. The original patch was written by Sixfortyfive. I've simply converted the patch into rom form for upload to the Workshop. Sixfortyfive as formally given permission for this to stay up but if at a later date he would like to upload this (or even if he would just prefer it not be up regardless) I would be more than willing to take this down.

For more information on this hack/fix as well as Sixfortyfive's other hacks and translations please visit http://www.romhacking.net/community/1093/

I previously had this uploaded 2 days ago but it seemed to have an issue with saving. This is a reupload that hopefully corrects that problem.