|Debut Level:||Haunted Dungeon|
|Allies:|| King Grex|
|Behind the Scenes|
|Home Franchise:||Goop (Series)|
|Appears in:|| Goop's World|
Goop's World 2
Mummblies are round spherical creatures, being a subspecies of Grumbly. However, not much about their appearance is discernible (except their red feet) because they are completely covered in bandages. There is one opening on the face, where nothing but darkness and one glowing yellow eye can be seen.
Mummblies are shown to be extremely weak, only dealing one damage and taking three simple spins to destroy. Their only means of attack is to run head-first into Goop, but once they start running, they can't change direction. One hit removes some of their bandages, the second hit removes the rest of their bandages (revealing a normal Grumbly), and the third hit defeats them.