Noobortuus
The Noobortuus is an EXCLUSIVE pet that was sold in the Exclusive Shop for a limited time. It was introduced in the Hell Update. It had a price of 1,200 Robux. It is based on the combination of Immortuus and Noob pets.
The latest Pet Simulator X value list for Noobortuus can be found below:

Regular
💎 43,000,000,000 (43b)

Golden
💎 Not Available

Rainbow
💎 Not Available

Dark Matter
💎 Not Available