A Palworld player has modded unused Pals back into the game, including the previously discovered Mewtwo dead ringer.
Breed Unreleased Pals was uploaded to Nexus Mods earlier this week by ShameIHaveNoFriends. Rather than plonking the unreleased Pals into the open world to be encountered, they must be obtained by breeding existing Pals.
Dark Mutant, Dragostrophe, and Bolt Mane (as its original Electric Type or a Fire Type variant) have been added, and ShameIHaveNoFriends has listed which pairs of Pals need to be bred in order to obtain them. They've also taken the liberty of assigning moves to each Poképal so they can be used in battle.