GBA?

How do you make GBA games work for R4?

they can't....Some ds cards, like the acekard brand as a great example, need to be linked with something called an ezy 3 in 1 flash card, which acts like a bridge, store them on the card, and once set it will boot it to the gba slot...NO DS CARD CAN EMULATE GBA GAMES only a gba itself (and a psp...but not as well :( ) can emulate a gba...If your card has the option to link with that card great-if not...need an emulator or a compatible card :(

As Of the time of posting any GBA game under 32 mb (read:Every gba game) is emulated on PSP perfectly with sound while most 32 mb games work there are a few that glitch a little bit

Actually you can.By using the latest YSMenu.But you still need slot-2 expansion.And sadly,you can just play the GBA games but you cannot save.This is the guide to use YSMenu in R4 as a replacement for firmware v1.18 http://forums.afterdawn.com/thread_view.cfm/731812