Whelp, it gets worse; even the NTSC titles aren't safe
Eurogamer write upIt seems performance and frame timing in general is an issue, the writeup of Jumping Flash speaks of it having a
30% reduction in fps over the original NTSC version
KK wrote:50Hz doesn't bother me because I won't know any better, but if games run worse than their EU disc based copies then that's really shambolic. I don't recall Tekken 3 having any framerate issues, but then maybe it did?
Most to all games from that era tied game logic to frame rate, so often in NTSC-PAL conversions games ran slower since that's 10 frames less per second to execute actions. The version of Tekken 3 on the Classic not only will run about 18% slower than it should, it'll be juddery since the Classic's output is otherwise at 60hz and so every fifth frame has to be duplicated. It'll be the same speed as you remember it on PAL but noticeably less smooth