This guide details how to obtain and utilize Hydreigon, a formidable Dark/Dragon-type Pokémon in Pokémon Scarlet and Violet. Hydreigon's power makes it a coveted addition to any trainer's team.
Obtaining Deino:
Hydreigon's evolution line begins with Deino, found exclusively in Pokémon Scarlet. To acquire Deino in Pokémon Violet, trading or transferring is necessary.
Deino and Zweilous Locations (Pokémon Scarlet):
Wild Deino can be found in:
- Alfornada Cavern (requires Koraidon's high jump)
- Dalizapa Passage
- Glaseado Mountain
- Area Zero
- North Province (Area Two)
Deino also appears in 3-star Tera Raids (post-3 gym badges). Zweilous, Deino's evolution, can be found in 4-star Tera Raids and in some of the same wild locations as Deino.
Transferring Deino (Pokémon Home):
For those without Pokémon Scarlet, the Pokémon HOME app allows transferring Deino from other compatible games (Sword/Shield, GO, etc.) to Pokémon Violet.
- Move Deino to your Basic Box in Pokémon HOME.
- Open Pokémon Violet in HOME and transfer Deino to a PC Box.

Evolution:
- Deino evolves into Zweilous at level 50.
- Zweilous evolves into Hydreigon at level 64.
Exp. Candy L and XL are recommended for faster leveling. Auto-battling can also expedite the process.

Hydreigon's Strengths and Weaknesses:
Hydreigon, a pseudo-legendary Pokémon, boasts a base stat total of 600. Its high Special Attack and Attack, coupled with good Speed, make it a versatile attacker. A Timid or Jolly Nature is recommended.

| Stat | Base Stat |
|---|---|
| HP | 92 |
| Attack | 105 |
| Sp. Attack | 125 |
| Defense | 90 |
| Sp. Def | 90 |
| Speed | 98 |
| Total | 600 |
Type Effectiveness:
- Super Effective Against: Dragon, Ghost, Psychic
- Weaknesses: Fairy (4x), Fighting, Bug, Dragon, Ice
- Resistances: Grass, Water, Fire, Electric, Ghost, Dark
- Immunities: Ground, Psychic
Terastallizing mitigates Hydreigon's 4x weakness to Fairy-type moves. Flash Cannon (via TM) is a crucial Steel-type move to counter this weakness. Other recommended moves include Nasty Plot, Dragon Pulse (or Draco Meteor), and Dark Pulse. Hydreigon's movepool allows for both physical and special attacking strategies.
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