Rotom-C is the "middle" Rotom forme; it is neither the best of the five nor the worst. Whilst Rotom-H and Rotom-W are off gallivanting in the upper tiers, Rotom-C finds itself stuck in RU. This is by no means a bad thing, however; thanks to its great base 105 Special Attack stat and decent base 86 Speed, Rotom-C makes for an excellent sweeper and scout. Leaf Storm is Rotom-C's defining move thanks to its incredibly high 140 Base Power (210 after STAB) and super effective coverage against several prominent RU threats, such as Slowking, Sandslash, and Kabutops. Rotom-C also has a unique typing that grants it useful resistances to Water-, Electric-, Grass-, and Steel-type attacks, making it the best counter to Lanturn and Rotom in RU. Rotom-C's defensive capabilities are further boosted by its great supporting movepool; it can use Will-O-Wisp or Thunder Wave to cripple opposing sweepers, and can use Pain Split to regain health.
Unfortunately, Rotom-C is highly susceptible to Fire-types, most notably Entei. It also struggles against bulky Grass-types, such as Roselia, which resists Rotom-C's STAB moves and can shrug off an unboosted Hidden Power Fire. Furthermore, Rotom-C's Grass / Electric typing doesn't grant the best type coverage, and almost all of Rotom-C's primary attacks have severe drawbacks: Leaf Storm sharply lowers its Special Attack, Volt Switch forces it to switch out, and Hidden Power Fire requires Rotom-C to slightly reduce its already low Speed. Regardless, Rotom-C is a great early- to mid-game Pokemon who can scout, hit hard, and cripple stall teams with Trick. Players, watch out for this little lawn mower, unless you want it to go all "Misery" on you.
What do you get when you combine STAB Volt Switch, immunity to both Spikes and Toxic Spikes, as well as good Speed and Special Attack, with a Choice Scarf? The answer: one of RU's fastest, most resilient, and strongest scouts. Volt Switch enables Rotom-C to escape its counters and hit them for considerable amounts of damage with its STAB Electric attack. Luckily, with a bit of prediction, Rotom-C can easily get rid of Ground-types on its own, thanks to Leaf Storm. Nevertheless, it is essential not to spam Volt Switch until all the opposing Ground-types have been KOed; if Rotom-C does use Volt Switch and a Ground-type switches in, not only will you have given your opponent a free turn, you will also lose any momentum you might have garnered up to that point.
Leaf Storm, being Rotom-C's most powerful attack, does huge amounts of damage to anything that doesn't resist it; it also destroys Ground-types, such as Sandslash and Rhydon, that might try to come in for free on Volt Switch. Thunderbolt offers a reliable alternative STAB to Volt Switch as it packs a lot more power and doesn't force Rotom-C to switch out after use. It also helps Rotom-C greatly against Substitute users such as Rotom, who can stall out Leaf Storm or force Rotom-C to switch out with Volt Switch. With only its STAB moves at its disposal, Rotom-C will find itself completely walled by defensive Grass-types, such as Roselia and Ferroseed; Hidden Power Fire enables Rotom-C to dent Roselia and to 2HKO Ferroseed and Tangrowth. Trick cripples a great number of Pokemon in RU, such as Eviolite Ferroseed and Roselia. They not only lose the defensive boosts that Eviolite gives them, but also the ability to switch moves, a disaster for any defensive Pokemon.Team Options & Additional Comments >>>
Thanks to its good bulk, great STAB moves, and above-average Special Attack and Speed, Rotom-C makes for a great user of Choice Specs. On top of this, most of Rotom-C's counters will be expecting it to run a Choice Scarf set; thanks to this set's much higher damage output, it is able to surprise a lot of its usual checks and counters. Volt Switch, Rotom-C's most useful STAB move, also lends itself well to Choice items, as it embodies the set's "hit-and-run" mindset. Rotom-C might seem outclassed as a Choice Specs user by other special attackers, such as Moltres and Typhlosion, due to their higher Speed and Special Attack stats, in addition to their better sweeping attacks. However, Rotom-C's good defensive typing—which means it takes little damage from entry hazards, unique STAB moves, and access to Trick, all ensure that Rotom-C isn't outclassed.
Volt Switch is Rotom-C's main STAB move. It hits very hard thanks to the Choice Specs boost, and enables Rotom-C to scout the opposing team while wearing down its counters with passive damage. A Choice Specs-boosted Leaf Storm is absurdly powerful and 2HKOes or OHKOes anything that doesn't resist it—or isn't named Munchlax. Even Pokemon that do resist it might fall; for example, after Stealth Rock damage, Leaf Storm 2HKOes Tangrowth and Sceptile, and also OHKOes Galvantula. Thunderbolt gives Rotom-C a more powerful Electric-type STAB attack that doesn't force it to switch, and helps Rotom-C beat Substitute users such as Rotom, who might try to stall out Leaf Storm. Hidden Power Fire hits Lilligant, Roselia, and Ferroseed, all bulky Grass-types that resist Rotom-C's STAB moves, but Roselia remains an effective counter as it is only 3HKOed by Hidden Power Fire. Trick enables Rotom-C to cripple many of its counters; for example, Roselia and Munchlax will be hard-pressed to wall Rotom-C if they lose the defensive boost from Eviolite, while even walls such as Clefable and Drapion are crippled if they cannot switch between moves.Team Options & Additional Comments >>>
With significant HP investment and Leftovers, Rotom-C can be an effective counter to many of RU's most threatening physical attackers. Leaf Storm is Rotom-C's most powerful option, and thanks to full investment in Special Attack and a Modest nature, it hits very hard. On top of this, Leaf Storm hits many physical attackers, such as Feraligatr, Sandslash, and Rhydon, for super effective damage. Volt Switch enables Rotom-C to scout as well as grab momentum, and hits surprisingly hard. However, should you want a more reliable option, Thunderbolt is viable: it hits much harder than Volt Switch, and—in comparison to Leaf Storm—is a more accurate, consistent, and effective STAB attack against the likes of Feraligatr and Kabutops. Will-O-Wisp is this set's key to dealing with physical attackers. Once burned, Pokemon such as Gallade and Hitmonchan pose much less of a problem to Rotom-C as their sky-high Attack stats will be cut in half. Will-O-Wisp also enables Rotom-C to wear down the aforementioned physical attackers to a point where it can take them out with an attack other than Leaf Storm. As it lacks any better option for recovery, Pain Split is used to keep Rotom-C around for longer. Thanks to its low HP stat, Rotom-C is often able to recover large amounts of HP, especially against the bulky foes that wall it. Entei in particular has a very high HP stat, so if Rotom-C can hit it on the switch in, Entei is likely to lose a large portion of its HP.Team Options & Additional Comments >>>
Rotom-C's unique Electric / Grass typing makes it a great asset to rain teams. While one might think that Uxie—the most common weather supporter—outclasses Rotom-C in this role thanks to its superior bulk, Rotom-C's great typing and useful resistances give it an advantage over Uxie. Its 4x resistance to Electric and 2x resistance to Grass allow it to switch in easily on moves that its Water-type teammates often attract; therefore, each time the rain ends and a Water-type sweeper is on the field, Rotom-C can easily switch in to take a hit, then summon the downpour again. Furthermore, Rotom-C itself benefits from the rain, which mitigates its weakness to Fire and grants it a perfectly accurate Thunder. Even when rain is present, Rotom-C can still provide additional team support and some offensive momentum by spreading status and threatening bulky Water-types; it is never a dead weight.
Rain Dance provides compulsory support for all rain teams. Volt Switch enables Rotom-C to switch out and safely bring in a sweeper after setting up rain; its weaknesses to Fire and Ice grant it good synergy with Water-type sweepers. Thunder Wave and Will-O-Wisp are both great options for additional team support; the former's ability to slow down threats is useful for when the rain is absent and Swift Swim is deactivated, while the latter makes it easier for the likes of Omastar to set up on physical attackers. However, these support moves should not be used when rain is active, as this will waste a turn of rain. Note that these status moves are only secondary support options; Rotom-C's main aim should always be to set up rain and switch out as soon as possible. Finally, Leaf Storm is a neat coverage move to punish Ground-types and Lanturn that try to prevent Rotom-C from Volt Switching out.Team Options & Additional Comments >>>
Unfortunately, Rotom-C's offensive movepool is, in a word, barren. As Shadow Ball lacks STAB and doesn't afford Rotom-C any significant coverage, it is a lackluster option. Discharge has slightly less power than Thunderbolt, but makes up for that with a great 30% paralysis rate. However, Rotom-C often finds itself hard-pressed to fit Thunderbolt onto a set, let alone Discharge. A SubCharge set is an option, but its effectiveness has been significantly reduced with the loss of Rotom-C's Ghost typing. To compound this issue, Rotom-C's only decent Grass-type STAB move, Leaf Storm, lowers its Special Attack two stages upon use, which makes boosting up pointless in the first place.
Luckily for Rotom-C, it has a great support movepool that any of its support sets can make good use of. Rotom-C can run an extremely annoying parafusion set to spread status while healing with Pain Split and scouting with Volt Switch. Access to both Reflect and Light Screen enables Rotom-C to run an effective dual screens set thanks to its good bulk and relatively good Speed. Finally, Rotom-C can also set up Sunny Day, though it does this less effectively than it sets up Rain Dance as it doesn't enjoy the boost to Fire-type attacks.
Checks and Counters
The first step towards countering Rotom-C is scouting its set, as offensive and support variants have different checks. Roselia and Amoonguss wall the Choice Scarf set with ease thanks to their titanic special bulk and lack of weaknesses to any of Rotom-C's moves. Ferroseed has a 4x resistance to Leaf Storm and a 2x resistance to Volt Switch, but must be wary of Hidden Power Fire. All the aforementioned switch-ins must be careful of being too predictable, however, as they will hate being Tricked a Choice item. As Choice Scarf Rotom-C doesn't hit too hard, it can also be checked by bulky Fire-types, particularly Entei, as they resist Leaf Storm and Hidden Power Fire, take relatively little damage from Volt Switch, and can KO Rotom-C with their STAB Fire attacks.
Choice Specs Rotom-C hits considerably harder than its Choice Scarf counterpart does, and can 2HKO all its usual checks with the appropriate move; as such, it doesn't have any surefire counters. Roselia is probably your best bet at countering Choice Specs Rotom-C as she is only 3HKOed by Hidden Power Fire; she can then put Rotom-C to sleep or 2HKO it with Sludge Bomb. Lickilicky takes significantly more damage from a Choice Specs Leaf Storm than it does a Choice Scarf one, but it can nonetheless stall Rotom-C out with Wish and Protect, or paralyze it with Body Slam. Specially defensive Cryogonal can stall out Leaf Storm with Recover if it has enough Speed, and it is only 3HKOed by Hidden Power Fire and Thunderbolt. Furthermore, Cryogonal can hit Rotom-C hard with STAB Ice Beam off its solid base 95 Special Attack.
Support Rotom-C is harder to counter in the strictest sense of the word, as its main purpose is to help the rest of its team rather than sweep or break walls. Most support sets are easily walled by Roselia, due to their lack of Trick, as well as their reduced damage output. The Rain Dance set in particular actually aids Roselia as it rids her of her weakness to Fire; furthermore, Giga Drain is super effective against the many Water-type Pokemon commonly seen on rain teams. Ferroseed and Amoonguss can also wall support Rotom-C thanks to the former's plethora of resistances and the latter's monstrous special bulk. However, both must be careful of Will-O-Wisp as they will not enjoy having their already lackluster Attack stats halved for the remainder of the game.