Nature Dragon
The Nature Dragon is an EXCLUSIVE pet that was obtainable from the Exclusive Pets Egg, with a 35% chance of hatching. It was only available for a limited time and was initially called the Forest Wyvern.
The latest Pet Simulator X value list for Nature Dragon can be found below:

Regular
💎 3,000,000,000 (3b)

Golden
💎 Not Available

Rainbow
💎 Not Available

Dark Matter
💎 Not Available