The three plants are in the afternoon plains area and there's one in the forest they're bright orange. The pig mask helps you find truffles in the sky islands, there is a detailed guide pinned in the help section of the discord server. There are only 8 masks in total. The fox and pig being able to follow you while you were the mask is just something cute they don't actually do anything
thanks for the reply and help on what and where i needed to go, but i just bought all the gallery one's since i had loads of coins to buy them, i'll prob hop in and go to them just to do that, but im pretty much done with the game and got what i wanted, can't wait to see your next project and see what it is, i'll join the discord also