The Abyssal Lump! I wonder what it's like having that many eyes.

How to get it:
1. You'll need to get a Devious Brew (which you can get from the Annual Halloween Event.)
2. Your Lump must have a lot of power potential (foods like Parfaits, Pumpkin Pies, and Drawing of an Apples will help.)
3. You'll need to make sure it has no affinity, you can achieve this by giving your Lump a Lock Charm and an Umbrella Charm after it hatches (if it already has affinities on it you can feed it Creepy Pumpkins to remove Heart and Flaming Hot Chilis to remove the rest except for Fire. Currently, there isn't a way to remove fire affinity from pets, so hopefully your Lump doesn't have any if you're aiming for this form.)