Anyone know what to do with $20 eShop credit? Should I use it on New Super Mario Bros. 2 DLC?
I'm surprised no one has mentioned it yet, but HarmoKnight is $15.
It's a rhythm game (think Guitar Hero) developed by GameFreak (of Pokemon fame). It has a really great art style, is a unique IP, and is really fun to play.
For reference I usually hate rhythm games but HarmoKnight is definitely worth it, IMO.
Also the extra Mii Plaza games are a really cool add-on. $15 as well.