I CANNOT KILL KUJA AT ALL.

So, I am giving up and buying a Gameshark.

I only have a PS2 though, and someone told me you have to actually buy a PSone to use the PSone gameshark...but I saw this PSone gameshark on Madcatz's website that looks like it should work on my PS2. It's just a normal game disc, and PS2's are backward compatible anyway...so it make sense that it would work on my PS2, but I don't know for sure.

Can someone please tell me if this disc will actually work on my PS2 before I go off and buy it like an idiot?