You’ll be able to round up Lugia, Rayquaza, and more by playing Blueberry Quests
All the new Pokémon announced for Pokémon Scarlet and Violet's DLC - Polygon
Current DLC mons that are coming back. Do note that this is based off Dex entries so some mons not included may not be here but still appear and vice versa, but
GameFreak Messed Up. ALL RETURNING DLC Pokemon in Scarlet & Violet
Who Scarlet & Violet DLC's New Pokémon Are In Hidden Treasure of Area Zero
Pokémon Scarlet and Violet DLC Brings Mew and Mewtwo on September 13 - QooApp News
Pokémon Scarlet And Violet: The Hidden Treasure Of Area Zero DLC Epilogue Hits Switch In January - Game Informer
All New Pokémon coming to Scarlet and Violet DLC
Pokémon Scarlet & Violet: All 25 Returning Legendary Pokémon Locations In The Indigo Disk
Pokemon Scarlet & Violet DLC: how to catch the Loyal Three - Video Games on Sports Illustrated
Pokémon Scarlet and Violet DLC Pokémon detailed in Nintendo Direct - Polygon