The Scarlet Book, which will appear in Pokémon Scarlet, and the Violet Book, which will appear in Pokémon Violet, are records from an expedition, and they were written long, long ago. The expedition is said to have traversed an uncharted area of the Paldea region, but whether or not the accounts depicted in the books are true remains unclear. It seems Arven always carries a copy of one of the books with him.
Photographs and sketches of unidentified creatures fill the pages of the Scarlet Book and Violet Book. While there have been sightings of similar creatures in recent years, such reports are rare, and specific details of the creatures’ biology are still a mystery.
Note: Great Tusk will be depicted in the Scarlet Book, and Iron Treads will be depicted in the Violet Book.