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.

However, if raw power and stats are your main focus, you're better off focusing on regularly upgrading to the next level of regular pets. Learn how to get the castle key in Roblox: Pet Simulator 99!

Pet Simulator 99's latest update ushered in the Easter Event, where you can hop into the new Easter-inspired map for the opportunity to obtain free pets.