Which Pokémon are in the Mineral egg group?

There are 12 Pokémon in the Mineral egg group, including Geodude, Graveler, Golem, Onix, Steelix, and more.

Can Mineral group Pokémon breed with other groups?

Pokémon in the Mineral group can only breed with other Pokémon in the same group (or with Ditto).

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Rock, crystal, and inorganic Pokémon. Many are Rock or Steel-type with slow egg cycles.

12 Pokémon belong to the Mineral egg group.