The base game of Pokemon Scarlet and Violet has six major legendaries for players to catch, with plenty of more opening up once Pokemon Home transfers begin, and plenty of rare Pokemon on top of that. Some evolutions require players to walk thousands of steps with them out in the wild, while others require players to gather items to evolve them, like Sinistea Chips for Ceruledge, but the rarest Pokemon may actually be a shiny Three-Segment Dudunsparce.