Norflash memory is a bonus.
Remember the Compact version can't play gba.
The Compact can play GBA games, but it's limited to 8MB ROM's or some such (sorry, I've got a DX and I can't be bothered to look).
If you are talking about the GBA game sized EZ4 miniSD or the original EZ4 lite, the NOR is required to play 256 Mb ROM's as it only as 128 Mb's of PSRAM.
Sounds good. But is there any other recommended carts for GBA playback only? I used to own a F2A Ultra and the fact that I can only play, at the most, ONE GBA rom at a time sucked. Then came the M3 and it was awesome but I sold it and got the R4. Now I'm looking for for another GBA cart to finish off Tactics Ogre and FF Tactics and a bunch of other games. Could the EZF IV link up with the R4 so that some DS roms which requires the GBA cart to unlock extras work? Or is there other recommended GBA carts?