When you are in a battle and a pokemon knocks you out,choose the pokemon that was just knocked out (you must have gone to the pokemon center and healed just before the knockout) it will let your pokemon fight,but it's picture will be faded,as if it were still knocked out. sadly,after this happens (in my case anyways)it says you lost all your pokemon next time that pokemon (the one that was attacking while knocked out) is KOed.