I also forgot to mention that I have a Super Gameboy 2 and a Super Gameboy Commander!
As for the European goodies I have
Game Boy gallery (5 Games in 1) (Two game carts, Two Boxes, one manual, one very complete)
Mario's Picoss (JUE version)
Fifa soccer 98
As for possible beta games
Lion King (Gameboy)
Super Breakout (Gameboy
Frogger (Gameboy)
Some other game
Tetris Gameboy (Should have music 1.1 but has 1.0 music but everything else to make it seem 1.1)
I don't remember what else I have. I'll have to post pictures sometime.