hello bought in Aliexpress a cartridge of "Super Mario Mix 3" asked the seller had knocked to save and he said yes, however when arriving not had the battery :( game, but he had the slot for the battery, then I put a , however ... continue without saving ... anyone know if it is possible to modify it to save the game?
(http://i.imgur.com/cgnIjRP.jpg)
(http://i.imgur.com/Gw6OKSV.jpg)