Image Source: Roblox Corporation via Twinfinite Lastly, if you put some serious time in Pet Simulator X and have huge pets you left behind, you can transfer them into Pet Simulator 99.

Learn how to get the key and unlock the castle in Pet Sim 99 in order to gain access to the Trading Plaza in this Roblox experience.

Pet Simulator X features multiple ways to enhance your pets, but making Huge pets is one of the most profitable ones.

This quest might make you think you've stumbled into Roblox Chest Simulator instead of Pet Simulator X! Giant Hacker Chests can be found scattered around the area in front of the Hacker Portal.