What exactly is needed for GBA and DS roms on a DS console

Hi, I am looking into getting the R4 and I had a look at the tutorial for using that. Would the R4 be able to play GBA roms exactly the same way as DS roms or would a different card be needed, I read something about the other slot being used but I didn't understand properly. Do the micro SD and the usb come with the R4 or are they bought separately?
Thanks, sorry if these are really obvious questions..

Unfortunatly you cant play GBA roms on the R4 or M3You would need a slot 2 cartrage :/ it sucks but you can downlaod emulators to play roms of gameboy color games if that helps lol

Okay, thanks. What slot 2 cartridges can you get for that, do they also need a memory card or is it just one cart? Thanks.

This will take a while ill have a look lol........http://en.wikipedia.org/wiki/Nintendo_DS_storage_deviceTheres a link to a website what should have information for all slot 1 and 2 devices for the R4DS

unfortinatly i got college :( ill try and help out later if i can bye

Thanks for your help, I looked at that wiki and it looks like it'd be better to buy a separate GBA flash card for my gba like an x-rom or something... thank you =]

no problem, well im late so cya :P