Amiibo will be able to unlock planes in Ace Combat Assault: Horizon Legacy + for Mario, Bowser, Pac-Man and more. here are the confirmed planes for the game:
Samus plane 
Pac-man plane 1
Mario plane 1
Mario plane 2
Captain Falcon plane 
Pac-man plane 2
Bowser plane 1
Bowser plane 2
Donkey Kong plane
Donkey Kong plane 2
Peach plane 1
Zelda plane
Link and Toon Link plane
Luigi Plane 1
Peach plane 2
Luigi Plane 2
Fox plane
That's what Amiibo do in Ace Combat Assault Horizon Legacy +
