nah that challenge is too hard for me
Metagross @ Metagrossite
Ability: Clear Body
EVs: 252 Atk / 4 Def / 252 Spe
Jolly Nature
- Iron Head / Zen Headbutt
- Ice Punch
- Substitute
- Hidden Power Fire
Ferro checks Meta all day, so slap on a HP Fire to kill them, and Sub because it's free and avoids Leech Seed. You can run Naive or something but it's not worth losing bulk against everything only to hurt Ferro a little more:
0- SpA Mega Metagross Hidden Power Fire vs. 252 HP / 4 SpD Ferrothorn: 76-92 (41.9 - 50.8%) -- guaranteed 3HKO after Leftovers recovery
vs
4 SpA Mega Metagross Hidden Power Fire vs. 252 HP / 4 SpD Ferrothorn: 88-104 (48.6 - 57.4%) -- 40.6% chance to 2HKO after Leftovers recovery

Metagross @ Metagrossite
Ability: Clear Body
EVs: 252 Atk / 4 Def / 252 Spe
Jolly Nature
- Iron Head / Zen Headbutt
- Ice Punch
- Substitute
- Hidden Power Fire
Ferro checks Meta all day, so slap on a HP Fire to kill them, and Sub because it's free and avoids Leech Seed. You can run Naive or something but it's not worth losing bulk against everything only to hurt Ferro a little more:
0- SpA Mega Metagross Hidden Power Fire vs. 252 HP / 4 SpD Ferrothorn: 76-92 (41.9 - 50.8%) -- guaranteed 3HKO after Leftovers recovery
vs
4 SpA Mega Metagross Hidden Power Fire vs. 252 HP / 4 SpD Ferrothorn: 88-104 (48.6 - 57.4%) -- 40.6% chance to 2HKO after Leftovers recovery