Assuming you're talking about the original PS2 version and not the one in the HD collection recently released in Japan- soon to be coming stateside- it worked fine on mine. No problems.
However, if you can handle waiting until the end of the year, just get the 1.5 collection. HD KH Final Mix, RE: Chain of Memories, and the 358/2 Days Cutscenes, all in glorious HD. I'd say its worth the wait. --- Humankind cannot gain anything without first giving something in return. To obtain, something of equal value must be lost.
Game runs just like it was on a PS2, because it technically is since the 60's have all the PS2 stuff in them. --- HOCKEY'S BACK! GO PREDS! WELCOME BACK TO SMASHVILLE! PSN: Lord_CBH / Live: LordCBH / Nintendo Network: LordCBH