The Huge Pony is an EXCLUSIVE pet that is available from the Exclusive Pets Egg, with a 1.5% chance of hatching. This is actually the Huge version of the Pony pet.
The latest Pet Simulator X value list for Huge Pony can be found below:
💎 447,000,000,000 (447b)
💎 625,000,000,000 (625b)
💎 820,000,000,000 (820b)
💎 Not Available