Ariados

“It spins string not only from its rear but also from its mouth. It is hard to tell which end is which.”

— Pokémon Gold

“A single strand of a special string is endlessly spun out of its rear. The string leads back to its nest.”

— Pokémon Silver

“Rather than mak­ ing a nest in one specific spot, it wanders in search of food after darkness falls.”

— Pokémon Crystal