The Phoenix is a LEGENDARY pet that is available from the Obsidian Egg found in the Spawn World. This pet has been re-skinned as the Glitched Phoenix and Sapphire Phoenix.
The latest Pet Simulator X value list for Phoenix can be found below:
💎 7,500 (7.5k)
💎 25,000 (25k)
💎 75,000 (75k)
💎 300,000 (300k)