Bad engrish, I think hes either asking how many harvest moon games are there for the GBA which I believe is like 3-5 games(check gamefaqs.com for a list) or how many are playable with VBA which should be all of them but I don't know for sure. When I used to usa VBA it had great compatiablity so I'm pretty sure that just about every single game is playable with the exception to games that require some sort of external un-emulatable source like external sensor but there are always ways around those things.