M-6 Prototype
The M-6 Prototype is a MYTHICAL pet that is obtainable from the Dark Tech Egg with a ~0.00025% base chance of hatching. This pet is often confused with the M-2 Prototype. The Dark Tech Egg can be found in the Dark Tech area in Tech City.
The latest Pet Simulator X value list for M-6 Prototype can be found below:

Regular
💎 56,000,000 (56m)

Golden
💎 163,000,000 (163m)

Rainbow
💎 266,000,000 (266m)

Dark Matter
💎 418,000,000 (418m)