Rising from tar pits, Duotrum divide its power between its two brains. One of a powerful psychic mind, and the other of a once invincible dweller of the ancient world.
Thanks to its gargantuan jaws, which could shred thick metal plates as if they were paper, it was invincible in the ancient world it once inhabited. When their brains, now divided in two, are thinking the same thoughts, these Pokémon exhibit their maximum power.