Regional variants were introduced back in the Alola region, and one of the first Pokemon to receive this treatment was Sandshrew and its evolution, Sandslash. Both Pokemon were exclusive to Pokemon Moon, but for Gen 8, Alolan Sandshrew was made accessible to both Pokemon Sword & Shield players thanks to the Isle of Armor DLC. Pokemon Scarlet & Violet brings back regular Sandshrew and Sandslash in The Teal Mask, which also means trainers can potentially get Alolan Sandshrew and Sandslash, too.