Tentacruel @ Leftovers  
Ability: Clear Body
EVs: 248 HP / 252 Def / 252 SpA / 252 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Recover  
- Ice Beam  
- Toxic  
- Sleep Talk

Tentacruel

Tentacruel has the ability to check and counter many Pokemon, including Rayquaza, Groudon, Kyogre, and Poliwrath. A Timid nature with 100 Speed allows it to outspeed and 2HKO Rayquaza and 3HKO Groudon with Ice Beam. This allows it to revenge kill Groudon from low health, provided it has not used Dragon Dance. Toxic really hampers Kyogre, especially if they don't have Aromatherapy, alongside Recover/Sleep Talk users like Tyranitar. Its Water/Poison typing gives it an important Fighting resistance without a Ghost or Rock weakness. In short, Tentacruel is a great special wall with a great typing, and a good choice in the meta.

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