Just curious? Is it a performance thing or maybe dolphin isn't optimized on ARM yet?
The OGA is way too underpowered for dolphin, i guess.
Only a few less demanding games could run okay, but i guess there won't be much (or even any) gamecube/wii game, that will run at full speed on the OGA.
The Go Advance would at least need 4 to 6 GB of ram to work with dolphin and even then it wouldn’t be able to run such games as Super Mario Sunshine, Super Smash Melee, Etc.