Note: This page is based on an assumption referencing Animal Crossing: New Leaf since the Animal Crossing mobile game is not released yet. Will be updated once the game gets available!
Gyroids can be found by digging in your town each day. Mostly, it can be found after the rain or snow. There's a lot of gyroids in the game. Each one possesses a unique sound and shape. Some of them are NPCs. You can either gather them or sell them for 828 Bells each.