Egg Groups
Egg groups determine which Pokémon can breed together in Polished Crystal. Two Pokémon can produce an egg if they share at least one egg group. Click on any group to see all compatible Pokémon.
Large, powerful Pokémon including starters and Nidoran lines
Amphibious Pokémon that live near water
Fish-like Pokémon that live primarily in water
Invertebrate aquatic Pokémon like shellfish
Insect and arachnid Pokémon
Bird-like Pokémon and other flyers
Land-based mammals and quadrupeds
Cute, mystical Pokémon with magical properties
Plant-based Pokémon and fungi
Bipedal Pokémon with humanoid forms
Rock, crystal, and inorganic Pokémon
Gaseous, gelatinous, or shapeless Pokémon
Draconic and reptilian Pokémon
Special group - Ditto can breed with almost anything
How Egg Groups Work
Two Pokémon can breed if they share at least one egg group and are opposite genders (or one is Ditto). The offspring will be the same species as the mother (or the non-Ditto parent when breeding with Ditto).
Breeding Bridges
Pokémon in multiple egg groups act as "bridges" for transferring egg moves between groups. For example, Marill belongs to both Water 1 and Fairy groups, allowing egg moves to transfer between these groups.
Special Cases
- Ditto can breed with any Pokémon except those in the Undiscovered group
- Undiscovered group Pokémon (babies, legendaries) cannot breed at all
- Genderless Pokémon can only breed with Ditto