You should refer to this website from Nintendo detailing amiibo compatibility:
https://www.nintendo.com/amiibo/compatibility/
And the footnote...
There's currently only one game using read/write functionality with amiibo and that's Smash Bros., however starting with Mario Party 10 we'll have another game with amiibo read/write functionality. In that case if you have an amiibo that's compatible with both games (e.g. Mario), you can use that amiibo only with ONE of those games at a time. Games that have read-only access to amiibo, e.g. Mario Kart 8 and Hyrule Warriors, can always be used with any amiibo no matter if they're currently tied to another game with read/write access, as these games don't have to write data back to the amiibo.
Hope this clears any confusion.