Huge Rainbow Unicorn
The Huge Rainbow Unicorn is an EXCLUSIVE pet that could be hatched from the Exclusive Pets Egg, introduced in the Easter Event 2022. It had a 0.5% chance of hatching. It is the Huge version of the Rainbow Unicorn.
The latest Pet Simulator X value list for Huge Rainbow Unicorn can be found below:

Regular
💎 1,200,000,000,000 (1.2t)

Golden
💎 Not Available

Rainbow
💎 Not Available

Dark Matter
💎 Not Available