Also, the game's amiibo support was detailed by Nintendo JP a while ago.
https://www.nintendo.co.jp/hardware/amiibo/game/ajbj/index.html
Get an exclusive character themed pattern. (all versions of characters except Mario Sports cards)
Get a series themed pattern (includes characters from the Super Smash Bros series.)
- Mario
- Luigi
- Peach
- Yoshi
Characters not listed here will unlock a generic design pattern.
- All Kirby related amiibo
- All Zelda related amiibo, including the Champions
- All Splatoon related amiibo
- All Animal Crossing amiibo and cards + Villager.
Seems like syn Sophia toned down the unique amiibo support quite a bit from the third entry. Rosalina, Wii Fit Trainer and Samus support was dropped.