THANK YOU VERY MUCH!!!!
Konekogirl, he is right, Amiibos are just a scummy cashgrab by Nintendo, but, you are right too, MHS amiibos look beautiful too, in the end to each their own, you can hate amiibo or you can love them and nobody should get mad at you because of whatever you like.
To open more slots on a monstie you need STIMS, there are genus specific stims and there's universal Stim too, they are found at random in chests at the Labyrinth of Ordeals or they are fixed in chest from floor 31th and on at the Tower of Illusion, being the Universal Stim found in the 50th floor the chest everytime you clear that floor, have a happy riding