If you own a Switch and want to tinker, learn how to dump your own cartridges using Hekate + Lockpick_RCM. If you just want to play the game with zero hassle, buy the official cartridge from Amazon or Gamestop – it includes the base game on a 16GB card, and you can download the free update (v3.0.0) from Nintendo’s official servers without risking a ban.