Because it costs money, even if all it needs is some simple port?
Its not simply a matter of "we have games old games, lets put them in VC and make money!".It costs money and manpower to do that, and most of the time it dosent pay off.Sure, some titles like the world ends with you or Radiant Historia could ceartainly be successful, but those are the best among the best.The other ones, the other rpgs that release in the ds and are more obscure, sold very few for a reason.And putting them in the 3ds wont give them gigantic sales increase.Not to count the shovelware that the DS receive due to its popularity.Its a matter of costs X lucratibility and unfortunaly, if the game is too obscure and its not nintendo-owned, it probably wont see the light of day
My (locked) thread about how difficulty should be a decision for the developers, not the gamers.
https://gamrconnect.vgchartz.com/thread.php?id=241866&page=1
