Huge Crystal Dog
The Huge Crystal Dog is an EXCLUSIVE pet that is available from the Season 1 Toys DLC Codes. There is a 5% probability of getting this pet from an Epic Tier DLC Code, and a 15% probability from a Mythical Tier DLC Code. It has the Best Friend and Random Enchantments. This pet was introduced in the June 24th, 2022 update.
The latest Pet Simulator X value list for Huge Crystal Dog can be found below:

Regular
💎 3,000,000,000,000 (3t)

Golden
💎 5,000,000,000,000 (5t)

Rainbow
💎 11,500,000,000,000 (11.5t)

Dark Matter
💎 Not Available