Wood was never made for DSTWO, but its native GUI is easy enough to understand. As for the GBA emulation, only reaaaaally problematic games (Golden Sun series and Classic NES series comes to mind), every GBA game runs almost flawlessly.
I know this is offtopic and a potential grave dig but I have to say it, I remember helping exophase with gpsp when I was younger and we kept trying to get those golden sun games working and let me tell you that are REALLY poorly coded. The devs for those games must have just thrown in a series of kludges just to get the game to work, and how it does I honestly have no idea.