about a week and a half ago i bought a copy of Pokemon emerald off of ebay, the seller said the game was in perfect working condition. when i finally get it (after realizing my ebay was still set to go to my parrents house) i play and about a day later i turn it on and it says, the game was corrupted and has been erased. i thought ok, maybee i'm just too used to how diamond is saved and i started over. later that day it does the same thing. i start over. and again today it says the same thing, game corrupted and erased. i did notice that it seems to happen when i go to pokemon diamond instead of GBA game, but then i've not tried to play w/out having the DS cart in. were there any problems with saving in this game? or did i just get a bad game off ebay? and if i did get a bad cart, should i report it to ebay? or just suck it up and buy a new cart off the shielf?