Hey Guys,
So the problem seems to lie in the fact that slot 2 devices don't boot up if there is something in slot 1, is that the gist of it? Even is the slot 2 device was just a slot 2 device and not a slot 1 device that can also handle gba games.
I have some original GBA games I got off eBay but despite what they said on the auction page they all turned ot to be USA versions and the game file deletes itself when I load up Diamond (AUS) to transfer the pokemon.
Thanks for the info so far, if anyone else has tried it and can shut this down once and for all that'd be great though.
Thanks guys,
Brett