said by Weirdal:I was being sarcastic, because GBA games are tiny.
Not as tiny as the itsy-bitsy DS games that freak me out. I don't even want to let my daughter touch hers, I still remember a cousin's kid losing one inside a sofa one Christmas and having a meltdown. Whenever she has her 3DS case open I methodically come by and count the games every 20 minutes or so to make sure none have disappeared.
With GBA games, I'd actually assume it might be a matter of lack of stock more than anything. I'd guess that fewer people are trading them in at this point, so there are fewer for them to resell without taking them from one store and shipping them around elsewhere.