A number of Pokemon can now be found in Ark: Survival Evolved as part of a mod by Mystic Academy. The mod replaces all of the dinosaurs in the game with a cast of about 30 different Pokémon, including Alakazam, Ninetales, Blaziken and Rapidash. The models and animations for the mod were ripped directly from Pokemon X and Y, with only slight changes applied in order for the mod to work properly.
Source: Kotaku