I've loaded all the pokemon provided into pokesav, went on random wifi battle, free mode, and still get the message saying there was a problem with my pokemon. I'm starting to believe that it isn't the Pokemon's problem now, since you've got it working. Reaaally frustrating >.>
Is there anything I'm doing wrong while joining a random game? All I have to do is to go upstairs of any pokemon center, talk to the NPC furthest right, Random battle, Challenge, Singe Battle, Confirm, save, connect to wi-fi, then go Free mode right?
I really appreciate all the replies jasterj, thanks.