My Ds Lite will not reconize games. - Nintendo DS Lite Console

Your game slot is probably dirty. You first trying blowing in it and see if that dislodges enough dirt to allow a game to start. Either way you want to buy a DS Lite game slot cleaning kit and clean the connectors in the slot. Also, make sure you clean the game contacts as well. If they have dirt on them it will get stuck on the contacts in the console when you put it in to play it. DON'T use alcohol to clean games or the ds slot. Buy a kit.