From Bulbapedia, the community-driven Pokémon encyclopedia.
The Water 2 Egg Group (Japanese: すいちゅう2 Underwater 2) is one of the fifteen Egg Groups. Like its counterparts Water 1 and Water 3, it is mostly made up of Water-type Pokémon. As of Generation VI, 23 Pokémon belong to this group.
Characteristics
Pokémon in the Water 2 Egg Group are mostly fish-like, with a few members being based on cephalopods. Almost all are Water-type.
Pokémon
Only in this Egg Group
In this and another Egg Group
In other languages