help with super smash bros melee GC

[Shonumi]

Not every game is designed to run at 30 FPS. Most (NTSC games that is) are designed to run at 60, and Melee is one. One possible issue is that you might have set your Framelimit to 30. Make sure to set it to Auto and if that fails, try Audio. Post your settings so we can take a look, even if they are at the "defaults", it never hurts for others to double-check.