Amiibo bin files refer to the binary data files stored within Nintendo's amiibo figures. These files contain data that can be used by compatible games, such as Super Mario Odyssey, to unlock specific in-game content, characters, or to otherwise interact with the amiibo. Essentially, each amiibo figure acts as a small storage device that holds information readable by Nintendo games.
Tapping specific amiibo (or their emulated bin counterparts) provides various gameplay advantages: Amiibo Generator - GitHub Pages mario odyssey amiibo bin files link
For developers:
However, collectors and completionists face two major problems: some Amiibo (like the Wedding Outfit Mario or the Skyward Sword Zelda) are rare, expensive, or out of print. Others simply don't want to carry a shelf full of plastic figures on their commute. Amiibo bin files refer to the binary data
Unlike Breath of the Wild , which rewards you with random loot, Super Mario Odyssey uses Amiibo for specific, non-random unlocks: Tapping specific amiibo (or their emulated bin counterparts)