So, shortly after trading the biker in Goldenrod the Drowzee for his Machop w/ Macho Brace I equipped it to a Murkrow and went out to train. Server crashed while in battle. Server has now just came back up, and due to the rollback I guess I do not have the Machop or the Macho Brace. This would not be a big deal except that it is not allowing me to trade again with the biker either. It seems kind of crazy that I can lose the item, but then not be allowed to trade for it with the npc again. I wouldn't raise the issue except Macho Brace can be very important for training.