Oh for a second I thought you meant the actual game and I was about to stand up for Planet Robobot.
But yeah you’re right Amiibo in Planet Robobot is trash. You get a random ability, which makes no sense. But if you have one from the game, it makes Kirby look like that character.
Also you forgot Super Mario Odyssey. You can buy the costumes you get in the game so you don’t even need the amiibo