I had the old grey brick one too Alpha. But it was a shared one between my siblings and I. It was like the coolest thing ever back then! I only remember playing Tetris and some golf game. I can't recall any other games at present. I actually think it might still be in this house somewhere. I never had a GBA so Idk the difference. I assume the games were in colour? Please someone inform me.

Oh and I remember having a thing for the super Nintendo that allowed you to insert gameboy games in the game cartridge. I can't remember the name.