In 2012, Nintendo came up with an amazing video game, Animal crossing. At the start, the game was limited to only one region but after a year, different parts of the world released this font, including Australia, America, and Europe. Millions of users downloaded this game on their mobiles.
You are free to use the font without getting the font license. Furthermore, you can apply the font in your printing, trading, commercial and other paid projects free of cost.
Amazingly you don't need any access or permission to use the font in your projects. Moreover, you only need to download the font in your system to start applying to your all paid and unpaid work projects. Hence, it is one of the many reasons for the font's popularity.