Blue BIG Maskot
The Blue BIG Maskot is an EXCLUSIVE pet that was only available after completing the Dress Up! Achievement. This pet can be made into Golden, Rainbow or Dark Matter versions which is not common for EXCLUSIVE pets.
The latest Pet Simulator X value list for Blue BIG Maskot can be found below:

Regular
💎 376,000,000,000 (376b)

Golden
💎 No Data

Rainbow
💎 No Data

Dark Matter
💎 No Data