do yourself a favour mate and buy yourself one of these mate !!!http://www.r4cards.co.uk/
if your not v teccy essentially its just like a memory card in the shape of a ds game cartridge ,and you download all the games from torrent sites and store them on the r4 cartridge .........
its cheap to buy and games then cost you nothing due to downloading from torrwnt sites so well worth it mate have these for all my kids and there ds,s and never had a problem
infact havnt bought a game for them in over 3 yrs so well worth it mate