I've just bought GBA Pokemon Emerald on Ebay for DS1's birthday - I know it works on the DS. However, I've just noticed it is coming from Singapore and is NTSC format.
Have I been a wally? I got over-excited as I was involved in a bidding war for another (UK) copy and lost. Saw this one and went for it without reading properly - should probably have been suspicious as there were no other bids and I got it for a fiver less than the one I'd just lost.
Even if it is compatible I suppose I may have bought a cheap fake copy...sigh...