Usually it will say on the box or title screen.
You could have;
Harvest Moon DS
Harvest Moon DS Cute
Island of Happiness
Sunshine Isles
Tale of Two Towns
Chat with our AI personalities
none :( there are glitches for the boy version of harvest moon ds though. but for harvest moon cute, they were fixed :(
In Harvest Moon DS you can only be a male character. There is a female version of that game called Harvest Moon DS Cute. If you want to play as a girl you must get that game, and not the regular Harvest Moon DS.
Yes, you can marry Muffy on harvest moon ds, but it takes a while, i would suggest looking for websites like Fogu.com that tell you all aout harvest moon.
I think sooo... yes
You can only get out the village if you have japenese version and a GBA connection!