not more than 10 games.
as of thinking of buying the 3ds,i bought a n64 emulator(downloaded it).it came with like 200 emulated games.i played 4 of the games but finished none.i would give a first impressions score to them:
1.pokemon stadium 2-9/10
2.mario party 3-9/10
3.harvest moon 64-6/10
4.star fox 64-1/10
i am overally impressed by the graphics.and the games are just *FUN*