Galaxy Pegasus
The Galaxy Pegasus is an EXCLUSIVE pet that could have been bought from the Exclusive Shop for a limited time. It was released in the Steampunk Update. Glitched versions of this pet have 75 million damage rather than the normal 550 million.
The latest Pet Simulator X value list for Galaxy Pegasus can be found below:

Regular
💎 78,000,000,000 (78b)

Golden
💎 Not Available

Rainbow
💎 Not Available

Dark Matter
💎 Not Available