A bunch of recommendations:
- Mario Kart DS CTGP-Nitro (custom track mod)
- Mario Kart 7 CTGP-7 (Custom track mod)
- Animal Crossing Wild World (Cozy game)
- Animal Crossing New Leaf (Cozy game)
- Mario & Luigi Bowser's Inside Story + Bowser Jr's Journey (Fun hybrid-combat jrpg)
- Metroid Prime Hunters
- Monster Hunter 3 Ultimate [Circle pad pro required]
- Monster Hunter 4 Ultimate (Best in series IMO) [Circle pad pro required]
- Monster Hunter Stories (spinoff pokemon-like)
- Sonic Rush
- Sonic Rush Adventure
- New Super Mario Bros
- New Super Mario Bros 2
- Super Mario 3D Land
- Rhythm Heaven Megamix
- Star Fox 64 3DS
- Ace Combat Assault Horizon Legacy
Ask away about any of them if you have questions