Vapormie's jewel core resembles a Water Stone, fooling many divers that search for the precious stones. Touching their core causes a mild headache and forgetfulness, which scientists believe is Vapormie's way of deterring threats.
People in ancient times imagined that Vapormie were transformed from the reflections of stars that twinkled on gentle waves at night. Vapormie underwent a spontaneous mutation and grew fins and gills that allow them to live underwater.
