How do you play GBA Roms on the DS

I'm new to whole NDS Roms thing and stuff and just wondering how do you play GBA Roms on the DS do you use a flashcart like for NDS or do you need something else if so what product would you recommend?Thnx for everyones help I know this is a noob question XD.

You need a Slot 2 flashcart that is connected to the GBA slot of the DS to play GBA games. If you are looking to purchase one, go to http://www.gbatemp.net/ and then Reviews, they have detailed reviews on virtually every Slot 1 and Slot 2 flashcart.

Thnx for the reply really helped.