Dark Cloud 2 is the only one of the 4 i mentioned that i don't own. I went through a bunch of lists and was trying to verify GH games that existed and I had Dark Cloud 2 marked as found picture evidence (but of course now I cant find it anywhere), so i may be wrong on that one, not sure.
Also the High School musical black box with the GH disc, I think it came in a big box with the dance pad (i guess thats why they didn't bother to print artowrk)