
UR -> C or C+
I have been testing out some more niche mons and I have found that Empoleon has stood out.
Empoleon @ Leftovers
Ability: Competitive
Tera Type: Water/Fairy
EVs: 252 HP / 252 SpD / 4 Spe
Calm Nature
- Surf
- Knock Off
- Stealth Rock
- Roost
This is the main set that I have found success with. SpDef Empoleon provides a steel type that is capable of taking on special water types like Primarina and Walking Wake, while also having the natural bulk to take hits from Gholdengo, non Focus Blast Darkrai, and Dragapult. Empoleon also provides good utility with moves like Knock Off and Stealth Rock, which can help make progress, and a decent 111 SpA stat that lets it deal solid damage with Surf. Roost is good for reliable recovery, helping Empoleon stay healthy. Another thing Empoleon has is Competitive, which can prevent Pecharunt from clicking parting shot. Empoleon after taking a parting shot will go up to +3, and can become a massive threat to the other team.
Tera Water is great because it boosts your stab surfs, and lets you 2HKO offensive Gholdengo, and remove ground weaknesses. Tera Fairy is also an option, as it flips weakness on fighting moves, and is a good defensive monotype. Tera Ground and Tera Flying are some other possible options.
This set is solid, but Empoleon also has more options, such as Flip turn for momentum, flash cannon for STAB, and roar to phase out setup sweepers. Air slash is also an option if you want to deal damage to Ogerpon coming in.
Here are some notable calcs on some things Empoleon can deal with.
252 SpA Gholdengo Shadow Ball vs. 252 HP / 252+ SpD Empoleon: 96-114 (25.8 - 30.6%) -- 1.7% chance to 4HKO after Leftovers recovery
252 SpA Choice Specs Dragapult Shadow Ball vs. 252 HP / 252+ SpD Empoleon: 117-138 (31.4 - 37%) -- guaranteed 4HKO after Leftovers recovery
244 SpA Choice Specs Walking Wake Hydro Steam vs. 252 HP / 252+ SpD Empoleon in Sun: 102-120 (27.4 - 32.2%) -- 54.1% chance to 4HKO after Leftovers recovery
252 SpA Darkrai Dark Pulse vs. 252 HP / 252+ SpD Empoleon: 96-114 (25.8 - 30.6%) -- 1.7% chance to 4HKO after Leftovers recovery
252+ SpA Primarina Moonblast vs. 252 HP / 252+ SpD Empoleon: 60-71 (16.1 - 19%) -- possible 8HKO
Some replays:
https://replay.pokemonshowdown.com/gen9ou-2423850073-iqarg8wiextos72utvmgkj8viw82buipw?p2
https://replay.pokemonshowdown.com/gen9ou-2423843004-iqrriwxem5lhi6c7mi4lm6fyk66o8jfpw?p2