The Blimp Dragon is a MYTHICAL pet that is obtainable from the Mechanical Egg, with a ~0.0005% base chance of hatching. The Mechanical Egg is unlocked in the Steampunk Area in Tech City.
The latest Pet Simulator X value list for Blimp Dragon can be found below:
💎 73,000,000 (73m)
💎 227,000,000 (227m)
💎 533,000,000 (533m)
💎 923,000,000 (923m)