Articuno @ Black Sludge  
Ability: Snow Cloak / Pressure
Tera Type: Dark / Ghost
EVs: 252 Spe  
Naive Nature  
IVs: 6 HP / 0 Atk / 0 Def / 0 SpA / 0 SpD  
- Substitute  
- Tailwind  
- Protect  
- Roar / Snowscape / Sandstorm

Articuno

Articuno is 4x weak to Stealth Rock and immune to Sticky Web and Arena Trap but annoyingly bulky - not even Magnemite Steel Beam can OHKO Naive it! Articuno has a reasonable 85 base Speed, access to Tailwind and Roar, and the ability to raise its evasion with Snow Cloak and Snowscape. If you're more prone to lending chip team support with Sandstorm, though, Pressure can be used instead to hopefully try to PP stall. A Naive nature along with Black Sludge lets Articuno be OHKOed by Steel Beam from more fringe users like Goodra-H and Lucario. 6 HP IVs let Articuno's max. HP be divisible by 8 so it KOes itself faster. Tera Dark lets Articuno dodge Prankster, while Tera Ghost lets it escape Shadow Tag and move-based trappers along with making it weaker to Knock Off.

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