As part of its ongoing efforts to promote every single Pokémon out there, The Pokémon Company has shared special content dedicated to Eevee, Vaporeon, Jolteon and Flareon:
Did you know? When Vaporeon’s fins begin to vibrate, it is a sign that rain will come within a few hours. Its body’s cellular structure is similar to the molecular composition of water. It can melt invisibly in water.
Source: The Pokémon Company
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