play GB Games on nintendo 2ds xl

Hello there,
i have just discovered this website and i think its great.

I would like to relive my childhood by playing all my old super mario games on my Nintendo 2ds xl which i have just bought.

i have an R4 card with some games on it but i cannot get the gameboy games to play i can get the game to show up on the ds but cannot get them to play. Any help and advice on if this is possible would be much appreciated.

thank you