Amy Winehouse

Using Action Replay for Emulation on Nintendo DSI?

I am looking to emulate my old gameboy advanced games on my dsi, and know that there are r4 cards that allow this. I also understand that the Action Replay has a microSD slot and could probably be used for the same purpose. How does it stack up to an r4 card for emulation (i dont care about cheats) for gba, gbc, snes, genesis, and even ds roms, and how would i go about doing this?