Knight Dude
Keeping it going.
Well, if you really liked that Kirby game, Triple Deluxe should also be up your alley.I own Pilotwings Resort, Super Smash Bros 4 3DS, Mario and Luigi: Dream Tour, Paper Mario Sticker Star, and Kirby: Planet Rob obot.
As I mentioned eariler, the two Azure Striker Gunvolt games would be a good choice too. You get both of them in a physical game cartridge or download them separately. There's also 3 of the 4 Shantae games on the 3DS E-Shop, the first 3 Metroid games,the first 3 Mega Man X games, Mega Man Legacy Collection, Demon's Crest and Shovel Knight if you are looking for Platformers.
Since you also mentioned RPGs, Pokemon Sun/Moon, Bravely Default and Bravely Second, and Xenoblade Chronicles(if you have a newer model) are good choices.
If you want another fighting game, Street Fighter 4, Tekken 3D and DBZ: Extreme Budoten are playable too.
I know not of all of those are "obscure", but there's plenty to choose from.