While it shouldn't have been made too easy, I think the current ways of collecting aren't good either. At one point there's just no way for you to make sure you'll receive a new trophy. Shop is about as random as random pickups. I mean, Melee had a lottery and that one had 'only' about 293 trophies. It's even worse for custom moves with it having no shop at all or option to unlock if you connect the 3DS version to the Wii U version.
It's the Tharja trophy.
No, but 3DS Corrin, huh? (S)he comes with two extra trophies, did you count those as well?