Tests show that its cells closely resemble water molecules, which perhaps explains its ability to conceal its form while submerged. I believe the origins of mermaid folklore lie with this Pokémon.
Vaporeon is a Water-type Pokémon. It takes double damage from Electric and Grass, and resists Fire, Water, Ice and Steel. Its base stats add up to 525: the highest is HP (130) and the lowest is Defense (60).
It is the second stage of its evolution line, along with Eevee. Its ability is Water Absorb, and its Hidden Ability is Hydration. It is in the Field egg group and can breed with 277 species. In Scarlet and Violet it learns 24 moves by level-up and 44 by TM.
BASE STATS
ABILITIES
If hit by a Water-type move, the Pokémon has its HP restored instead of taking damage.
Cures the Pokémon's status conditions in rain.