Scarf Rotom-Mow
Rotom-Mow @ Choice Scarf
Ability: Levitate
EVs: 8 HP / 252 SpA / 248 Spe
Modest Nature
IVs: 0 Atk
- Thunderbolt
- Volt Switch
- Dark Pulse/WoW
- Leaf Storm
General idea
One of the weakness of Rotom is that middling Spe, which leaves it being outsped by many threats.
The movepool is harsh, so you have to work with few options available. A fast Will-O-Wisp is also a neat possibility because you can ruin reckless threats that, otherwide, would have stopped you in your tracks.
EVs spread and item
EVs are pretty standard with a Modest nature chosen over the Timid one to have the highest damage output possible.
Choice Scarf add a great level of unpredictability to your Rotom-Mow and is not that bad that you have to switch out after a Leaf Storm.
Team support
Thunder Wave support is always a good thing and now you can even use it along with Dark Pulse to paraflinch your opponent to death.
SR support is always appreciated to ensure to have the upper hand in a 1vs1 situation.
Some calcs:
252+ SpA Rotom-Mow Thunderbolt vs. 8 HP / 0 SpD Salazzle: 211-249 (75.6 - 89.2%) -- guaranteed 2HKO
252+ SpA Rotom-Mow Thunderbolt vs. 0 HP / 4 SpD Moltres: 318-374 (99 - 116.5%) -- 87.5% chance to OHKO
252+ SpA Rotom-Mow Dark Pulse vs. 0 HP / 4 SpD Roserade: 79-94 (30.2 - 36%) -- 45.3% chance to 3HKO
252+ SpA Rotom-Mow Leaf Storm vs. 4 HP / 0 SpD Glalie-Mega: 241-285 (79.8 - 94.3%) -- guaranteed 2HKO