I don't know why, but suddenly I had 255 Hyper potion, I denfinitly didn't buy. I saw them first after I meet all the requierments for finding ledgendaries on the map.
Not that I'm upset, but I believe it's not suposed to be that way.
Edit:
The 255 Hyper Poitons do not show while in battle while they are still listed in my item inventory.