Rotom

Levitate
This Pokémon is immune to Ground moves.
Type Tier
Electric / Ghost UU
Statistics
Min- Min Max Max+
HP
50
- 241 304 -
Atk
50
122 136 199 218
Def
77
171 190 253 278
SpA
95
203 226 289 317
SpD
77
171 190 253 278
Spe
91
196 218 281 309
Name Item Nature

Double Status

Leftovers Timid
Moveset EVs
~ Will-O-Wisp
~ Thunder Wave / Confuse Ray
~ Shadow Ball
~ Thunderbolt / Discharge
6 HP / 252 SpA / 252 Spe

Cripple sweepers with the appropriate status move and plug away with Rotom's STAB moves. Discharge is an option over Thunderbolt if you're willing to trade power for a higher chance of paralysis. If you choose Discharge, then Confuse Ray can be used in place of Thunder Wave which can help to further annoy your opponent or allow a team mate a better chance of a free switch-in.

Name Item Nature

Trick Specs

Choice Specs Timid
Moveset EVs
~ Thunderbolt
~ Shadow Ball
~ Hidden Power Ice / Hidden Power Grass / Hidden Power Fighting
~ Trick
6 HP / 252 SpA / 252 Spe

430+ Special Attack and 309 Speed is pretty good, especially with all those immunities to switch in on. Plus, you can Trick your Choice Specs onto a tank/physical attacker. One of his support options like Will-O-Wisp can go in place of Hidden Power. Ice and Grass both cover Ground-types, plus Ice covers Dragons and Gliscor while Grass hammers the likes of Swampert, Gastrodon, Golem and Rhyperior. Fighting is mostly for Dark-types coming in to Pursuit Rotom.

Other Options

Rotom does get Reflect and Light Screen for team support. Thunder if you're feeling lucky, or have Rain support on your team. Besides those, his movepool is limited.

EVs

Timid nature with max Speed and Special Attack. Defensive EVs don't really help. Modest is an option for a little extra power, but being able hit 300+ Speed with Timid is the better choice.

Opinion

Gengar and Mismagius both outclass him easily thanks to their higher Speed and Special Attack and vastly superior movepools. Even Banette gives him some competition as he can Calm Mind to boost his Shadow Balls and Thunderbolts, although he doesn't receive a STAB boost on Electric attacks like Rotom.

A decent choice for blocking Rapid Spin as his STAB moves or a potential burn scare off some of the more useful Spinners. Repeated hits from Starmie's Surf and Donphan's Stone Edge do him no favors though.

Not that potent as a special sweeper really, but he does have good STAB moves and access to both Thunder Wave and Will-O-Wisp is useful too. You need to send him in on one of his immunities as even attacks he resists will do a lot of damage to those piss poor defenses.

Counters

Camerupt is immune to both status attacks, just watch out for repeated hits from Shadow Ball, especially on the Choice Specs set. Ninetales and Rapidash won't like getting paralyzed, but both can absorb Will-O-Wisp and can easily kill off Rotom with their STAB attacks. Meganium and Vileplume can use Aromatherapy to remove status, but won't enjoy Trick. They are both resistant to Electric and have decent Special Defense to take hits from Shadow Ball. Lanturn absorbs Electric attacks and can handle three Shadow Balls and wear down Rotom with Surf.

Rotom isn't hard to kill off, most neutral attacks can at least 2HKO him but any potential switch-ins have to be wary of Thunder Wave, Will-O-Wisp or being Tricked.