Swap to Brown Bear is a silver reward scroll challenge from Black & White. It is located on top of an abode of Land 5's Japanese village and will only be available after this village has been converted.
By investigating the nearby woods, the player will find creature poo surrounded by flies. By picking it up, it will disappear, and another one will spawn nearby. The player must use the sound of the flies to locate the rest of the poo (it gets louder as the player approaches it).
Upon finding the last one, the challenge is completed.