Omastar @ Air Balloon  
Ability: Weak Armor  
EVs: 4 Def / 252 SpA / 252 Spe  
Modest Nature / Timid Nature   
- Shell Smash
- Hidden Power [Grass]  
- Surf / Hydro Pump  
- Ice Beam

Shell Smash Omastar (Rock)

by Neko

With an Air Balloon, Omastar takes advantage of Choice-locked foes such as Excadrill and Landorus-T to setup and sweep! Surf in conjunction with Hidden Power Grass sweeps Ground teams after a Shell Smash, targeting Hippowdon and Gastrodon. Hydro Pump lets it OHKO Celesteela after Stealth Rock damage. Ice beam deals with Garchomp and Zarude. A Modest nature lets it OHKO Corviknight and specially defensive Gastrodon, while a Timid nature outpaces Mega Aerodactyl at +2. Sticky Web is vital for Omastar to sweep, as this lets it outspeed Sand Rush Excadrill and Choice Scarf Zarude, so Shuckle is an indispensable teammate. Mega Diancie deals with Dragon- and Dark-types such as Latias and Mega Sableye which hinder Omastar's sweep. Choice Scarf Terrakion deals with faster threats such as Choice Scarf Galarian Zapdos and Zeraora, and in return appreciates Omastar's ability to remove defensive Pokemon such as Gliscor and Celesteela. Choice Band Tyrantitar deals with walls such as Toxapex and Alolan Muk which can take a hit from and revenge-kill Omastar.

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