
Metagross @ Metagrossite
Ability: Clear Body
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Meteor Mash
- Ice Punch
- Grass Knot
- Zen Headbutt
Can't switch into either Thundurus or Heracross if it hasn't mega evolved, but it can OHKO both members of the core, though it will usually get parad by Thundurus.
252 Atk Tough Claws Mega Metagross Ice Punch vs. 0 HP / 4 Def Thundurus: 316-374 (105.6 - 125%) -- guaranteed OHKO
252 Atk Tough Claws Mega Metagross Zen Headbutt vs. 0 HP / 4 Def Mega Heracross: 332-392 (110.2 - 130.2%) -- guaranteed OHKO
252 Atk Mega Heracross Pin Missile (5 hits) vs. 0 HP / 4 Def Mega Metagross: 195-230 (64.7 - 76.4%) -- guaranteed 2HKO
252 SpA Life Orb Thundurus Thunderbolt vs. 0 HP / 0 SpD Mega Metagross: 173-204 (57.4 - 67.7%) -- guaranteed 2HKO