Just want to pop in and say - The 3DS was a fantastic system for JRPGs, and if you consider the remakes and ports from the DS it’s probably one of the best libraries of any system alongside SNES, PSP, and Switch.
Fire Emblem: Awakening is for my money the best game on the system, There’s also Fire Emblem: Shadows of Valentia, and the oft maligned Fire Emblem: Fates which is better than people give it credit for
Radiant Historia: First Chronology is a remake of one of the best DS games and a super unappreciated RPG.
Bravely Default is a lovely breezy job class-based JRPG - The Alliance Alive is one too, though the HD remake available on Switch might be preferable.
Dragon Quest VII and VIII (and IX on DS)
Pokemon Alpha Sapphire is actually a really excellent and balanced feeling Pokemon game. Pokemon X/Y was alright and Sun/Moon has its fans.
Tales of Abyss had a very good port of a solid PS2 game.
Xenoblade Chronicles 3DS might be the worst way to play the game, but the audacity behind it and the fact that it is totally serviceable port kinda makes it worth buying just to check it out, even though the Switch definitive edition is much better.
I personally haven’t played these, but SMT IV, Apocalypse, Strange Journey Redux, Devil Survivor 1 & 2, and SMT Devil Summoner are all apparently great. Stella Glow and Ever Oasis are ones I still have in the shrink wrap, but I’ve heard very good things about them.
I’m going to pick up Crimson Shroud (created by the great Yasumi Matsuno) and Culdcept Revolt during this sale, since they’ll probably never get ported to another system and seem like interesting concepts for JRPGs.
The 3DS eshop also has retro games you can’t find easily other places like:
The Legend of the Mystical Ninja
Shining Force: Sword of Hajya
The Legend of the River King