Gacha Food
It will eat EVERYTHING you dropped. For higher taming effectiveness, see below
You can only feed a happy Gacha(without other Gachas being nearby recently). Sad Gacha will ignore you. Just simply drop something on the ground from your inventory, and it will soon eat it. The larger quantity of item dropped, the faster it is tamed. The rarer the dropped item is, the higher level it will become(affecting taming effectiveness).