I refreshed and hacked my N3ds XL recently and have been playing a ton of classics. A few:
- Pokémon HeartGold
- Mario Kart 7
- Shinobi
- Hatsune Miku: Project Mirai DX
- New Super Mario Bros 2
Getting Pretendo setup has been fun. I can play MK7 online again and there’s always people playing!