*Copied from Fatecrashers's check
Rotom-W
[SET]
name: SubSplit
move 1: Substitute
move 2: Pain Split
move 3: Hydro Pump
move 4: Thunderbolt
item: Life Orb
ability: Levitate
nature: Modest
evs: 236 SpA / 20 SpD / 252 Spe
[SET COMMENTS]
<p>Rotom-W's low base HP makes it an excellent user of SubSplit. Rotom-W's typing grants it multiple opportunities to set up Substitute during a match. The threat of Volt Switch, which is commonly found on the washing machine's other sets, can make obtaining the first substitute easy. By using Life Orb in combination with Pain Split and Substitute, this Rotom-W's power is stronger than any other popular set, excluding Choice Specs, while maintaining enough bulk to avoid being revenge killed. Under the right conditions, Rotom-W's usual counters will find themselves in tough positions.</p>
<p>Substitute and Pain Split form an effective combo that can put dents into opponents while safely restoring Rotom-W's health. The EVs and a Modest nature are designed to give Rotom-W the most power and Speed while giving its Substitute a good chance of surviving Gastrodon's rain-boosted Scald. Hydro Pump provides Rotom-W with a powerful STAB; in a similar vein, Thunderbolt is chosen to provide power while still remaining reliable.</p>
[ADDITIONAL COMMENTS]
<p> This Rotom-W by far works best in the rain, which powers up its Hydro Pump as well as giving it access to 100% accurate Thunder. Not only is Thunder much more powerful than Thunderbolt, it also gives a 30% paralysis chance to threaten typical switch-ins, such as Latios and Latias. While Discharge could be used over Thunderbolt for the paralysis chance, the power of Thunderbolt is preferred. When on rain teams, Thunder is best as it provides the same paralysis chance. A Timid nature could be used to outspeed certain threats, but again a Modest nature is used as it offers the most power. Also, Substitute gives Rotom-W a layer of safety, making Speed not such an issue, so therefore Modest is the best option. An alternative EV spread of 68 HP / 216 SpA / 4 SpD / 220 Spe offers the best chance to have an intact Substitute after Gastrodon's rain boosted Scald without compromising too much speed or power. However, when using the alternative EV spread, be aware that Rotom-W will not outspeed certain threats such as Swords Dance Toxicroak and Jolly Cloyster.</p>
<p>It should be noted that Toxic Spikes greatly improves the effectiveness of this Rotom-W set. With two layers of Toxic Spikes, Rotom-W has the potential to force out or stall out Gastrodon. Thus, Tentacruel and Roserade are excellent teamates for supplying Toxic Spikes; in addition, Tentacruel also works great on rain teams; Roserade can beat the spinners that would so desperately try to spin away the Toxic Spikes while simultaneously dissuading Gastrodon from switching into only one layer of Toxic Spikes. As with any other Pokemon, Spikes and Stealth Rock support is appreciated. In the rain, 220 HP Celebi finds itself 2HKOed by Hydro Pump after one layer of Spikes and Stealth Rock. Similarly, Blissey and Chansey find themselves 2HKOed by a rain-boosted Hydro Pump after two layers of Spikes and Stealth Rock. For this reason, Ferrothorn is a great teammate, doubly resisting Grass and providing much-needed Spikes and Stealth Rock support. Of course, Politoed is a great partner, providing the rain that makes this set substantially more powerful.</p>
<p>Celebi is a very big counter to this set, resisting both Rotom-W's STABs while being able to hit back with super effective attacks. Ferrothorn is in a similar boat, except it must be more wary of Pain Split. Do note that Ferrothorn lacking Power Whip will find themselves unable to break Rotom-W's Substitute easily. Chansey and Blissey can take 2 Hydro Pumps with no sweat, but dislike having Pain Split sapping away their health while refilling Rotom-W's. Lastly, Gastrodon counters this set completely, but must watch out for Toxic Spikes and Pain Split.</p>
Rotom-W
[SET]
name: SubSplit
move 1: Substitute
move 2: Pain Split
move 3: Hydro Pump
move 4: Thunderbolt
item: Life Orb
ability: Levitate
nature: Modest
evs: 236 SpA / 20 SpD / 252 Spe
[SET COMMENTS]
<p>Rotom-W's low base HP makes it an excellent user of SubSplit. Rotom-W's typing grants it multiple opportunities to set up Substitute during a match. The threat of Volt Switch, which is commonly found on the washing machine's other sets, can make obtaining the first substitute easy. By using Life Orb in combination with Pain Split and Substitute, this Rotom-W's power is stronger than any other popular set, excluding Choice Specs, while maintaining enough bulk to avoid being revenge killed. Under the right conditions, Rotom-W's usual counters will find themselves in tough positions.</p>
<p>Substitute and Pain Split form an effective combo that can put dents into opponents while safely restoring Rotom-W's health. The EVs and a Modest nature are designed to give Rotom-W the most power and Speed while giving its Substitute a good chance of surviving Gastrodon's rain-boosted Scald. Hydro Pump provides Rotom-W with a powerful STAB; in a similar vein, Thunderbolt is chosen to provide power while still remaining reliable.</p>
[ADDITIONAL COMMENTS]
<p> This Rotom-W by far works best in the rain, which powers up its Hydro Pump as well as giving it access to 100% accurate Thunder. Not only is Thunder much more powerful than Thunderbolt, it also gives a 30% paralysis chance to threaten typical switch-ins, such as Latios and Latias. While Discharge could be used over Thunderbolt for the paralysis chance, the power of Thunderbolt is preferred. When on rain teams, Thunder is best as it provides the same paralysis chance. A Timid nature could be used to outspeed certain threats, but again a Modest nature is used as it offers the most power. Also, Substitute gives Rotom-W a layer of safety, making Speed not such an issue, so therefore Modest is the best option. An alternative EV spread of 68 HP / 216 SpA / 4 SpD / 220 Spe offers the best chance to have an intact Substitute after Gastrodon's rain boosted Scald without compromising too much speed or power. However, when using the alternative EV spread, be aware that Rotom-W will not outspeed certain threats such as Swords Dance Toxicroak and Jolly Cloyster.</p>
<p>It should be noted that Toxic Spikes greatly improves the effectiveness of this Rotom-W set. With two layers of Toxic Spikes, Rotom-W has the potential to force out or stall out Gastrodon. Thus, Tentacruel and Roserade are excellent teamates for supplying Toxic Spikes; in addition, Tentacruel also works great on rain teams; Roserade can beat the spinners that would so desperately try to spin away the Toxic Spikes while simultaneously dissuading Gastrodon from switching into only one layer of Toxic Spikes. As with any other Pokemon, Spikes and Stealth Rock support is appreciated. In the rain, 220 HP Celebi finds itself 2HKOed by Hydro Pump after one layer of Spikes and Stealth Rock. Similarly, Blissey and Chansey find themselves 2HKOed by a rain-boosted Hydro Pump after two layers of Spikes and Stealth Rock. For this reason, Ferrothorn is a great teammate, doubly resisting Grass and providing much-needed Spikes and Stealth Rock support. Of course, Politoed is a great partner, providing the rain that makes this set substantially more powerful.</p>
<p>Celebi is a very big counter to this set, resisting both Rotom-W's STABs while being able to hit back with super effective attacks. Ferrothorn is in a similar boat, except it must be more wary of Pain Split. Do note that Ferrothorn lacking Power Whip will find themselves unable to break Rotom-W's Substitute easily. Chansey and Blissey can take 2 Hydro Pumps with no sweat, but dislike having Pain Split sapping away their health while refilling Rotom-W's. Lastly, Gastrodon counters this set completely, but must watch out for Toxic Spikes and Pain Split.</p>