From Bulbapedia, the community-driven Pokémon encyclopedia.
The Mineral Egg group (Japanese: こうぶつ Mineral) is one of the fifteen Egg groups.
This group is comprised mostly of Rock-type and Steel-type Pokémon. The common characteristic shared by this group are Pokémon of an inorganic nature, specifically taking on a rocky, crystalline or metallic appearance, hence the name, Mineral.
In this Egg group, most of its members are genderless, and can only breed with Ditto. This makes for a limited pool of moves that can be passed down among the few members of the group that can pass and inherit Egg moves. As of Generation V, the members that can breed was increased from five to eleven families, making breeding slightly easier.
Only in this Egg group
In this and another Egg group
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