Do you know how well Saturn games run on Lakka?changing to Alsathread fixes the pulse issue. as for gamecube when even a simple 2d game like Four Swords Adventures can not run without slowdown and audio issues I'd definitely call it unplayable. the same remains true for all games unless you are fine with audio bugs and slowdown.
Asking cuse the Three Dirty Dwarves game unfortunately doesn't appear to work with the recently found Cotton-emulator method aka ZebraEngine.