I've been playing around with Trick Room and Sun, so I will post some of the sets:
Druddigon @ Life Orb
Trait: Sheer Force
EVs: 252 HP / 252 Atk
Adamant Nature (+Atk, -SpA)
- Fire Punch
- Sucker Punch
- Earthquake / ThunderPunch
What it Does:
Druddigon is the premier Dragon-type of RU. Unlike pre-evo dragons like Fraxure and Dragonair, it has both bulk and power. Combine dragon's virtually unresisted offense with the useful water, fire, and grass resistances of a Dragon-type, Druddigon proves to be a very practical mon on a team.
This particular set is meant to be a pivot for offensive teams that can soften up the opponent's team for fellow sweepers; giving this monster easy switch-ins would cost the opponent dearly. Even more, Druddigon makes a fantastic TR Sweeper, hitting incredibly hard and fast while stomaching hits when necessary. Unlike Escavalier, a well-known TR beneficiary, Druddigon can plow through even Steel-types with a Sheer Force-boosted Fire Punch. For reference, even the most physically defensive Steelix would crumble in two blows. Sucker Punch equips Druddigon with a powerful priority to revenge frailer but faster Sweepers. The final slot is rather flexible. Earthquake provides the best coverage, as it readily OHKO the occasional Aggron; the move also allows Druddigon to finish off Fire-, Electric-, Rock-types, and Nidoqueen without resorting to Outrage. Same story for ThunderPunch, except now it's for Water- and Flying-types, such as Feraligatr, Slowking, Moltres, and Aerodactyl. The lack of LO recoil is also another one up for ThunderPunch.
Druddigon is more of a team player, so it is the one that usually help fill the holes in the team's weakness. A team that requires a solid wallbreaker that can also check some dangerous threats like Lilligant, Feraligatr, and Entei would appreciate its presence. Druddigon would also pair effectively with physical sweepers in needing help in weakening the opponent's physical defense, such as Crawdaunt or Klinklang.
Residual damage adds up, however, so either Wish or Healing Wish support may be optimal. Status conditions are also the bane of Druddigon, so a Heal Beller like Lanturn comes in handy. Lanturn can also provide some nifty paralysis support, as well as luring and Volt-switching out of Grass-types that Druddigon can chow down on.
A Trick Room setter, would provide amazing offensive support to allow Druddigon to plow through teams. Uxie and Mesprit are effective for this, and they also come in handy to check Nidoqueen that can bother Druddigon with her bulk and immense special powers. Mesprit even has Healing Wish to recover Druddigon for another round!
What Counters It:
Nothing outright counters it, since it virtually O-2HKOs the metagame. The best way to counter Druddigon is to bait it to Outrage with mons like Gallade, and bring in your Steel-type. Steelix can shrug off Outrages and proceed to weaken Druddigon with Toxic and Earthquake. Escavalier lethally retaliates with a CB Megahorn. If you don't have a Steel-type, you can sac the least useful member and revenge-kill it with the likes of Cryogonal.
Uxie, Rhydon, Cofagrigus are probably the most reliable non-steel switch-in to Druddigon. Uxie can tank a hit from Druddigon and paralyze or Psychic it. Rhydon weakens Druddigon with a powerful STAB Earthquake. Cofagrigus can burn a Druddigon locked into Outrage. Faster power hitters, such as Nidoqueen and Moltres can finish it off.
Whimsicott @ Heat Rock
EVs: 252 HP / 120 Def / 136 SpD
Calm Nature (+SpD, -Atk)
- Sunny Day
What it Does:
Prankster weather inducers are fantastic support for weather teams, and Whimsicott is no surprise. One should highlight the advantage in using Whimsicott over Volbeat, an arguably more popular weather supporter, and that would be Taunt. This is especially helpful for Sun teams, because many of the Fire-types that abuse the solar powers dislike SR. Taunt also prevents general set-ups, which is nice to prevent the opponent from setting up a Substitute or start using moves like Cosmic Power. It's nice Speed can also come in handy when shutting down opposing Rain teams. Encore and Memento provides a safe switch-in and even set-up opportunities for the Sun-blessed warriors.
Pokemon that can take advantage of the sun to its fullest would appreciate Whimsicott's support; particularly Fire-types that enjoys SR off of the field. These threats include Solar Power Scarf Charizard, CB Entei, Sunnybeam Moltres, and Victreebel.
Lilligant can partner up as a Sun Inducer; it can put problematic mons like SR Nidoqueen and SR Druddigon to sleep before they can set up SR.
What Counters It:
SR Nidoqueen and SR Druddican can put Whimsicott in a tough spot, guessing whether to Taunt the possible SR or set up Sun before it dies to Sludge Wave or Fire Punch. Otherwise, nothing short of the likes of Magic Coat Smeargle can prevent Whimsicott from blocking SR and summoning sunshine.
If the sun is summoned, the next best solution is to limit the extent of damage caused by Sun sweepers. One can utilize specially-bulky mons like Slowking or Munchlax to stall out Sunny Day. Protect, a faster Substitute, and using resistances work, too. Bouffalant or Druddigon can also be a decent check to chlorophyll sweepers. Powerful priority moves such as Absol's Sucker Punch and CB Entei's ExtremeSpeed can knock out weakened mons. Your own Lilligant or Fire-types can take advantage of the sun to counter attack the opposing team.
: Stun Spore is another viable alternative over Memento.
Victreebel @ Life Orb
EVs: 252 SpA / 252 Spe
Timid Nature (+Spe, -Atk)
- Weather Ball
- Sludge Bomb
What it Does:
Nothing sweeps better in Sun than Victreebel. Unlike other special Grass mons, it does not suffer from poor coverage (Lilligant), shaky accuracy (Sceptile), or power (both). STAB Sludge Bomb and the Sun-enhanced Weather Ball provides powerful and reliable coverage moves to plow through all Grass-resists of RU.
In addition to its already high-powered offense is a ridiculously good stat boosting move in Growth; after the double SpA boosts, Victreebel dgaf even Special Walls. It is almost rarely used, however, since Victreebel shines best end-game (although it can easily start its rampage any moment in the game).
Timid is useful to be faster than Scarf Galvantula.
Reliable Sun summoners with Heat Rock are Victreebel's best friend. Uxie; Prankster Sun summoners, such as Whimsicott and Volbeat; or even offensive mons like Moltres can accomplish this. Prankster Sun summoners are especially helpful, since they have Memento to offer Victreebel a guarantee turn to set up Growth. Heal Wish users, like Lilligant can also come in handy to give Victreebel a round 2 (or 3 >:D)
Victreebel also appreciates having sturdy walls shaken up a bit so it can overpower them when its turn arrives. Such targets include Clefable, Munchlax, Entei, Moltres, and specially-defensive Slowking. Solar Power Charizard and CB Entei can indiscriminately annihilate the opponent's defense. Flame Charge Emboar has the nifty STAB Superpower to eliminate Normal special walls. SR support from Uxie or Regirock also facilitates Victreebel's clean sweep. As for non-Sun abuser partners, Archeops can check opposing Fire-types and render special walls half-dead, while benefiting from the Sun halving Aqua Jet.
What Counters It:
Uxie, Clefable and Muchlax can absorb hits from Victreebel best. A healthy Entei can survive a Sludge Bomb and blitz Victreebel. If the opponent was successful in keeping rocks off of their fields, Moltres can also blast Victreebel. Cryogonal cannot switch into Victreebel without risking a KO the following turn, but it can survive a Weather Ball at 75% and revenge-kill Victreebel. Without a Growth boost, Slowking and Lanturn can survive a Giga Drain easily and paralyze or dispatch Victreebel. Druddigon, Nidoqueen, and Bouffalant are offensive answers that can also survive a hit to retaliate.
Strong ExtremeSpeed and Sucker Punch are useful revenge-killing tools. Utilizing your own Prankster Pokemon to change the weather or paralyze Victreebel also works. Scarf Tauros can surprise KO Victreebel. Unburden Hitmonlee with Fake Out can outrun Victreebel after the consumption of Normal Gem and proceed to Blaze Kick the shit out of it.
: Giga Drain may replace SolarBeam for the sweet sweet recovery to offset LO recoils - however the loss in power is severe. For instance, Lanturn safely tanks a Giga Drain to cripple Victreebel with T-Wave. Power Whip over Growth is another option for a sure-fire OHKO against defensive Slowking (after Rocks) and easy OHKO against Cryogonal. It also 2HKOs specially-defensive Clefable, and it's Victreebel's best bet against Munchlax. Make sure to change Victreebel's nature to Naive if you choose to go mixed.