This guide details how to obtain and utilize the powerful Dark/Dragon-type Pokémon Hydreigon in Pokémon Scarlet and Violet. Hydreigon, a pseudo-legendary Pokémon, boasts impressive stats and is a valuable asset to any team. However, its evolutionary line (Deino and Zweilous) is exclusive to Pokémon Scarlet.

Obtaining Deino:

Deino and its evolution, Zweilous, can be found in several locations within Pokémon Scarlet:

• Alfornada Cavern: Located in the southwest corner of the Paldea region. Koraidon's high jump ability is necessary to navigate this area.
• Dalizapa Passage: Situated between Medali and Zapapico.
• Glaseado Mountain: A readily accessible mountain range.
• Area Zero: The endgame area.
• North Province (Area Two): Another easily accessible location.

Deino can also be found in 3-star Tera Raids (unlocked after obtaining 3 gym badges), offering a chance at a different Tera Type and potentially its Hidden Ability. Zweilous appears in 4-star Tera Raids. Hydreigon itself can be obtained from 5/6-star Tera Raids.

Transferring Deino to Pokémon Violet:

Since Deino is Scarlet-exclusive, players of Pokémon Violet must obtain it through trading or transferring via Pokémon HOME. This requires a Nintendo Switch Online membership for Union Circle trading or the Pokémon HOME application for transferring from compatible games like Pokémon Sword/Shield, Pokémon GO, or Pokémon Scarlet.

The Pokémon HOME transfer process is as follows:

1. Move Deino from your source game to your Basic Box in Pokémon HOME.
2. Open Pokémon Violet in HOME and transfer Deino from the Basic Box to a PC Box.

Evolving Deino:

Deino evolves into Zweilous at level 50, and Zweilous evolves into Hydreigon at level 64. Utilize auto-battling or Exp. Candies (especially L and XL) to expedite the leveling process.

Hydreigon's Strengths and Weaknesses:

Hydreigon boasts a base stat total of 600, with high Special Attack and Attack, and good Speed. A Timid or Jolly Nature is recommended.

• Strengths: High offensive stats, versatile movepool (both physical and special).
• Weaknesses: 4x weakness to Fairy-type moves; also weak to Fighting, Bug, Dragon, and Ice.
• Resistances: Grass, Water, Fire, Electric, Ghost, and Dark.
• Immunities: Ground and Psychic.

Terastallization mitigates Hydreigon's 4x Fairy weakness. Consider a Steel-type Tera Type for STAB on Flash Cannon (learnable via TM), or utilize other moves like Nasty Plot, Dragon Pulse, Draco Meteor, and Dark Pulse. Due to its weakness to Fairy types, a Steel-type move is highly recommended.

This comprehensive guide ensures you can successfully add this formidable Pokémon to your team.