A Poison–Tera Type Hydreigon with the Mightiest Mark will appear in 7-star Tera Raid Battles in Pokémon Scarlet and Violet from November 6 to 9 and again from November 13 to 16. This special raid offers trainers a tough challenge and a chance to catch a rare Hydreigon with a unique Tera Type. Gather your best team, plan your strategy and don’t miss the opportunity to add this powerful Pokémon to your collection during the limited event windows.
Source: Pokémon Scarlet and Violet news and Pokemon.com
Source: Pokemon
