Rotom-F @ Leftovers
Trait: Levitate
EVs: 252 SpA/252 Spe/4 HP
Timid nature
- Blizzard
- Thunderbolt
- Will-o-wisp
- Pain split
So, first, the scenario where Piloswine's in first:
252Atk Piloswine (+Atk) Icicle Crash vs 4HP/0Def Leftovers Levitate Rotom (Neutral): 24% - 29% (60 - 71 HP). Guaranteed 5HKO.
252Atk burned Piloswine (+Atk) Icicle Crash vs 4HP/0Def Leftovers Levitate Rotom (Neutral): 12% - 14% (30 - 36 HP). Guaranteed 9HKO.
So upon switching into SR and an Icicle crash, Rotom's at worst at 47% after leftovers. Use Will-o-wisp, Pain Split and Will-o-wisp again if the first one misses. You'll be at something like 230/242 HP after the Pain split, worst case scenario barring crits. After Will-o-miss finally connects, you're pretty much golden. Start spamming Blizzard to prevent Braviary from switching in, and wait until Piloswine dies from the burn. You might have to Pain split once more if the first WoW missed.
Regardless, there's no way that Piloswine could actually kill you here bar some contrived scenario where he crits twice in a row, Blizzard misses all 8 times, and Pilo hits every single Icicle crash.
Braviary switches in and does
0Atk Braviary (Neutral) Brave Bird vs 4HP/0Def Leftovers Levitate Rotom (Neutral): 29% - 35% (72 - 86 HP). Guaranteed 4HKO.
while Rotom-F responds with
252SpAtk Rotom (Neutral) Thunderbolt vs 252HP/240SpDef Leftovers Braviary (+SpDef): 58% - 68% (236 - 278 HP). Guaranteed 2HKO.
And even if Rotom comes in with 1% HP, a Pain Split will bring Rotom back to 83%, easily surviving two B-birds and 2HKOing in response.
For Braviary leading, it's much of the same story. There's absolutely no way for Braviary to get in more than two unboosted hits, and that's actually his max-damage. So worst-case scenario, after SRs and leftovers, Rotom's somewhere around 23 - 25% HP. Piloswine's Ice shard only does 14% damage max, so Rotom can safely Pain Split (to full, or nearly full health, I might add) and repeat the burning/stalling strategy until Piloswine also falls.