Signature BIG Maskot
The Signature BIG Maskot is an EXCLUSIVE pet that was obtainable after completing the Celebrity Crush Achievement. There are glitched versions of this pet that exist with different power levels. Unlike most other Exclusive pets, there are Golden and Rainbow versions of this pet.
The latest Pet Simulator X value list for Signature BIG Maskot can be found below:

Regular
💎 89,000,000,000 (89b)

Golden
💎 No Data

Rainbow
💎 No Data

Dark Matter
💎 Not Available