The Huge Lucky Cat is an EXCLUSIVE pet that was available from the Exclusive Pets Egg with a 2% hatch rate. It was released in the Mastery Update. This is actually the Huge version of the Lucky Cat pet.
The latest Pet Simulator X value list for Huge Lucky Cat can be found below:
💎 366,000,000,000 (366b)
💎 680,000,000,000 (680b)
💎 930,000,000,000 (930b)
💎 Not Available