Not exactly Ep17. There's a large difference between porting a game to the DS and emulating a game on the 3DS. If you port a game, it's designed to run on that console. if you emulate the system, you're having to run through another layer to get directly to the code. So while Majora's Mask 3D exists, you couldn't emulate the N64 to run Majora's Mask on the 3DS.