Ancient Pokémons, also known as prehistoric Pokémon, are the first Pokémons, after the Legendary Pokémons, who lived in the world of Pokémons. Some of these Pokémon still live today. Those who are extinct can sometimes be obtained from specific fossils, naming them Fossil Pokémons.
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A frozen Mamoswine was dug from ice dating back 10,000 years. This Pokémon has been around a long time.