Egg Groups are just groups of Pokemon that are compatible with each other (when breeding)

If a Male Vaporeon with Water Pulse was bred with a Female Vaporeon, the move would not be inherited

Head over to Darkshade’s official guide to see the groups in pretty detail, or use Bulbapedia(or other fan site) to look up specific Pokemon.

This aspect of breeding has pretty much remained unchanged from the handhelds. Assuming the two species are compatible(see Egg Groups), then the baby Pokemon will always be that of the mother. This will be the female parent in almost all cases, with the exception being breeding with Ditto, where the Ditto will be considered the mother, regardless of who the partner is. Ditto can breed with any species, including Genderless Pokemon, but excluding Undiscovered Pokemon and other Ditto. Again, see the Egg Group section for more details. There are some exceptions, which are due to two different species being a part of the same species chain. Illumise/Volbeat, Nidoran(f/m), etc.

  • In the case of two Pokemon of the same species, quite obviously, the offspring will be that species.Read More