Sooo, before playing FS3D, you should try out RPG Maker (Fes) Player, it has some really good features.
— nba::yoh (@MrNbaYoh) August 11, 2017
Pretty much this, but with a game that's actually available on the eShop.
https://gbatemp.net/threads/mrnbayoh-strongly-recommends-you-download-flipnote-3ds.479628/
So if you're on 11.4 or 11.5 with no access to CFW, then update to the latest version and download RPGMaker Fes Player, available for free.