Well I kind off forgot this existed. Not that anyone is reading but hmm..
Anyway, I've finished the boards. Yeah should've told you, I swapped the AtTiny for a Greenpak. Why you ask? -Just because I can, and I wanted to play with them for a while now.
So yeah the 2 PCBs have been ordered;
The Greenpak Adapter board, although this euhm yeah went kind of wrong. So I've reordered them
The GBA2 itself;
So yeah all that remains is waiting for the PCBs and getting the parts. then hopefully I've got myself a working GBA2