Klawf Ogerpon. Heikegani are crabs native to Japan noted for the peculiar pattern on their shells. When viewed from above, they appear to have the scowling face of a samurai mask imprinted on their shell. According to legend, this the result of the enmity of drowned samurai from the Taira clan–also known as the Heike–imprinting itself on these crabs. Sometimes they use an Oni too.
by SweetBarge