Tranquill

“It can return to its Trainer’s location regardless of the distance separating them.”

— Pokémon Black

“Many people believe that, deep in the forest where Tranquill live, there is a peaceful place where there is no war.”

— Pokémon White

“No matter where in the world it goes, it knows where its nest is, so it never gets separated from its Trainer.”

— Pokémon Black 2