Strange Phantasy Star IV bug my brother ran into...

[CommieCowboy]

I know this will sound hard to believe, but in like 1995 or 1996, my brother, having acquired a love for the game by watching me play through it on the many occasions in which I had rented it, decided he would start his own game. He had made it all the way to the Climate Centre on Dezolis, when all of sudden, he hit a bug that made the game nigh unplayable: anytime Chaz got attacked, he got hit for 999 damage. No attempts to rest in the inn, change Chaz's equipment, restore his saved game or try a different dungeon were able to fix this issue on that particular game, and my brother was forced to abandon his game. Has anybody else run into this situation or having any idea what may have triggered it?

[thriwren]

I never ran into this, but I had let my beloved PSIV to be borrowed and my friend say he got a game over after defeating the second DF (Gaurbec tower).