Girafarig

“Its tail has a small brain of its own. Beware! If you get close, it may react to your scent and bite.”

— Pokémon Gold

“Its tail, which also contains a small brain, may bite on its own if it notices an alluring smell.”

— Pokémon Silver

“When it is in danger, its tail uses some sort of mysterious powers to drive away the enemy.”

— Pokémon Crystal