Screenshot from MyFullGames
The grind between Deino, Zweilous, and Hydreigon is the longest Pokemon players will ever experience. Hydreigon is very fast and is one of the best competitive Pokemon to use due to its high special attack. Tailwind and Draco Meteor are reason enough to want a Hydreigon on its own, but Zweilous’s evolution requires a huge investment. Using EXP Candy will speed up the process, making raids very important to save time.
At what level does Zweilous evolve into Hydreigon in Pokemon Scarlet and Violet?
Deino evolves into Zweilous in the level fifty and Zweilous evolves into Hydreigon at level 64. This makes it the highest level evolution for any Pokémon in the series next to the Drakloak and Larvesta evolutions. It is highly recommended to farm Pokémon that grant a large amount of experience like Chansey and Blissey or do Tera Raids to speed up the process. An update on how to force Pokemon sprouts to work may help you figure out how to get them to spawn reliably.
Related: All the start and end dates of the 7-star Tera raid events in Pokémon Scarlet and Violet
How to get Zweilous in Pokémon Scarlet and Violet
Deino is exclusive to Pokemon Scarlet, but Hydreigon is often found in Tera Raids when played online for Pokemon Violet players. Trading is also a great way to get the Pokemon or join a friend’s Circle of Union and travel to their spawn locations with them. Both Pokemon tend to spawn near caves and if players are having trouble finding Zweilous, the Deino located on the eastern side of the map will usually be around level 50. One Rare Candy will evolve them one step closer to Hydreigon.
To find out what the best nature is for these Pokémon, see Best Nature for Deino, Zweilous, and Hydreigon in Pokémon Scarlet and Violet, and to find out which dragons are the best, see Best Dragon Types in Pokémon Scarlet and Violet in the MyFullGames.