It's been six whole days and I haven't made one single RU rain guide contribution? I feel so... DIRTY! Oh well, here are two more. Both of Rotom-C, but they're different roles. First one right here-
Electric / Grass
HP: 50 / Atk: 60 / Def: 107 / SpA: 105 / SpD: 107 / Spe: 86
Rotom-Mow @ Damp Rock
Trait: Levitate
EVs: 252 SAtk / 248 HP / 8 Spd
Modest Nature
- Leaf Storm
- Volt Switch
- Will-O-Wisp
- Rain Dance
Classification: Rain Summoner
Description: Rotom-C provides a unique kind of support. It doesn't have Cresselia's insane bulk. It doesn't have Prankster like Volbeat. It doesn't have U-Turn or Rocks like Uxie. So what advantages does it have? The big advantages are its excellent typing and its attacking prowess. Since Rotom is Grass/Electric, it will have great synergy with most Rain Teams, as it resists Grass and Electric, two of the biggest issues for Water Types. It also circumvents its Fire Weakness with the Rain Dance, as this is its biggest weakness with things like Entei and Moltres running around. This typing is also good offensively, as it gets coverage on threats like Moltres, Poliwrath and Lanturn. Its STABs are also fantastic, as Volt Switch / Leaf Storm handle a large amount of the metagame.
Another good incentive to use Rotom over most rain summoners is his attacking prowess. Most summoners have horrible attacking punch, like Cresselia and Uxie and Volbeat. When you see these guys staring you down, you just laugh. You don't laugh at Rotom. Look at that base 105 attack stat, backed up with max SpA and a Modest Nature. STABed Leaf Storms are extremely powerful, hitting even some of the bulkiest pokes hard. Take a look at this-
252+ SpA Rotom-C Leaf Storm vs. 4 HP / 0 SpD Rotom: 268-316 (110.74 - 130.57%) -- guaranteed OHKO
That is serious damage. Volt Switch is Rotom's Electric STAB of Choice, doing damage and providing a safe switch to a sweeper. It also helps maintain the switch advantage in an offensive game. And for maximum trolling and weakening threatening physical sweepers, you have Will-O-Wisp.
Shortcomings: Even top-tier threats like Rotom have some hurdles to clear. Firstly, its coverage is not perfect, as an opposing Rotom-C laughs off any offense provided by this set, and it can either win the switching race with Volt Switch or smack us with HP Fire. Lilligant stomps on Rotom, putting it to sleep and setting up easily with Quiver Dance, not fearing either of our Rotom's STABs. Cresselia swats away Rotom-C like a pesky mosquito, watching it helplessly switch out as Cress recovers any lost HP. The worst matchup of all for Rotom-C would have to be Druddigon, however. Resisting both dual STABs, Druddigon can safely paralyze the switch-in with Glare, and take minimal damage from Volt Switch. And a paralyzed Rotom-C is not the most useful thing in the world.
However, these hurdles are not impossible. The first three threats (Rotom-C, Lilligant and Cresselia) are all crushed by Durant, as the metal ant outspeeds them all and hits them hard with SE X-Scissors. Durant is also good in Rain, as its only weakness (Fire) is made less painful by Rain. However, an even better partner may be Jynx, who handles Druddigon and the Grass types. So, those two combined can easily support Rotom, and they both benifit from Rain.
Other Options: Thunder Wave is an option over Will-O-Wisp, but a good Rain team should be quick, and not need para.

HP: 50 / Atk: 60 / Def: 107 / SpA: 105 / SpD: 107 / Spe: 86
Rotom-Mow @ Damp Rock
Trait: Levitate
EVs: 252 SAtk / 248 HP / 8 Spd
Modest Nature
- Leaf Storm
- Volt Switch
- Will-O-Wisp
- Rain Dance
Classification: Rain Summoner
Description: Rotom-C provides a unique kind of support. It doesn't have Cresselia's insane bulk. It doesn't have Prankster like Volbeat. It doesn't have U-Turn or Rocks like Uxie. So what advantages does it have? The big advantages are its excellent typing and its attacking prowess. Since Rotom is Grass/Electric, it will have great synergy with most Rain Teams, as it resists Grass and Electric, two of the biggest issues for Water Types. It also circumvents its Fire Weakness with the Rain Dance, as this is its biggest weakness with things like Entei and Moltres running around. This typing is also good offensively, as it gets coverage on threats like Moltres, Poliwrath and Lanturn. Its STABs are also fantastic, as Volt Switch / Leaf Storm handle a large amount of the metagame.
Another good incentive to use Rotom over most rain summoners is his attacking prowess. Most summoners have horrible attacking punch, like Cresselia and Uxie and Volbeat. When you see these guys staring you down, you just laugh. You don't laugh at Rotom. Look at that base 105 attack stat, backed up with max SpA and a Modest Nature. STABed Leaf Storms are extremely powerful, hitting even some of the bulkiest pokes hard. Take a look at this-
252+ SpA Rotom-C Leaf Storm vs. 4 HP / 0 SpD Rotom: 268-316 (110.74 - 130.57%) -- guaranteed OHKO
That is serious damage. Volt Switch is Rotom's Electric STAB of Choice, doing damage and providing a safe switch to a sweeper. It also helps maintain the switch advantage in an offensive game. And for maximum trolling and weakening threatening physical sweepers, you have Will-O-Wisp.
Shortcomings: Even top-tier threats like Rotom have some hurdles to clear. Firstly, its coverage is not perfect, as an opposing Rotom-C laughs off any offense provided by this set, and it can either win the switching race with Volt Switch or smack us with HP Fire. Lilligant stomps on Rotom, putting it to sleep and setting up easily with Quiver Dance, not fearing either of our Rotom's STABs. Cresselia swats away Rotom-C like a pesky mosquito, watching it helplessly switch out as Cress recovers any lost HP. The worst matchup of all for Rotom-C would have to be Druddigon, however. Resisting both dual STABs, Druddigon can safely paralyze the switch-in with Glare, and take minimal damage from Volt Switch. And a paralyzed Rotom-C is not the most useful thing in the world.
However, these hurdles are not impossible. The first three threats (Rotom-C, Lilligant and Cresselia) are all crushed by Durant, as the metal ant outspeeds them all and hits them hard with SE X-Scissors. Durant is also good in Rain, as its only weakness (Fire) is made less painful by Rain. However, an even better partner may be Jynx, who handles Druddigon and the Grass types. So, those two combined can easily support Rotom, and they both benifit from Rain.
Other Options: Thunder Wave is an option over Will-O-Wisp, but a good Rain team should be quick, and not need para.