Hubert
The Hubert is a very special EXCLUSIVE pet, with only four of them said to ever exist. Only Preston, the creator of Pet Simulator X, and three of his team members have the Hubert pet.
The latest Pet Simulator X value list for Hubert can be found below:

Regular
💎 No Data

Golden
💎 Not Available

Rainbow
💎 Not Available

Dark Matter
💎 Not Available