Milly Mushroom is a mushroom with a light blue bottom and reddish orange top. She has black freckles.
Her variant is a mushroom with an orange bottom and a red top. She has brown freckles.
- Milly is the second mushroom Shopkin to be released, the first being Miss Mushy-Moo from Season One.
- In the CT art for Milly Mushroom's purple variant, there is a random black dot by her mouth.
- The CT art of her blue variant gives her freckles a thicker outline than the other ones.