FusionDex

These lake-dwelling Pokémon emit a bright, albeit ominous, light from their large, hair-like feelers even from the darkest depths. On nights with full moons, they emerge and sing enchanting melodies that draw many to them.

Goureon underwent a spontaneous mutation and grew fins and gills that allow them to live underwater. Singing in eerie voices, they wander town streets on the night of the new moon.