what do gallery pieces do in my hero ultra rumble

In "My Hero Ultra Rumble," gallery pieces are collected as you play the game and can be used to complete different scenes from "My Hero Academia" episodes and illustrations in the Gallery. Once a certain amount of pieces is deposited into a picture, tiles can be cleared, and the picture will be tossed in rotation to be a loading screen before matches. There are a total of 10 pictures that can be unlocked in the gallery, and each illustration art requires a different number of panels that you need to collect before you see the full picture