The Mustu is a limited mythical petling in RoPets that was released during the Halloween Event (2022). It can be obtained out of the Halloween Capsule at an 11.111% chance, which could have been purchased for 
100 from the Halloween Petling Capsule Machine.
Appearance[]
The Mustu shares its mesh with the Musta and the Musto, both of which are its variants and are present in the same set, that is, the Mustache Set.
Evolution[]
The Mustu, similar to other special petlings, cannot be merged.