A GBA is a short term for Game Boy Advanced Games. I'm sure everyone one has had one once or at least used it once or even seen it when they were kids. My favorite game was Donkey Kong Country for the GBA. I still have it but I don't use it. Believe it or not GBA games are still made/sold today. Mainly for DS but they do have it acessable for GBA. #NerdMoment?
This Finding Memo one and the guy with the whip in some castle, I could never get past level 4 on that