Nice collection you got going. Cool to see that you have Zero Mission, Superstar Saga, Minish Cap, Advance 4, Sonic Advance 2, and now Golden Sun along with The Lost Age.
Also your GBA SP is in wayy better condition than mine, looks brand new in comparison. I got my SP over 10 years ago and I played the hell out of it and brought it out whenever I could. As a result the system is a bit scratched up in places, the paint is worn out, cartridge slot needs some cleaning, and the battery needs to be replaced.