Alright, in this post I'll be explaining Trick Room in further detail with Pokemon that set it up, Pokemon that sweep under it, and Pokemon that threaten Trick Room teams.
Trick Room
In OU, it's definitely difficult to design a successful Trick Room team, since after your Trick Room time is over, you'll have a tough time trying to set it up again. Not to mention Bullet Punch Scizor which can destroy Trick Room teams since it will always hit first for hard damage.
On the other hand, NU doesn't necessarily have many "strong" priority users as they're all in the above tiers. With this being said, designing a NU Trick Room team is not all that difficult. There are many NU threats that can take advantage of Trick Room, and many that can set up Trick Room. I will explain these below.
Pokemon that set up Trick Room
Banette: Having a pitiful base 65 Speed and a great base 115 Attack stat really will guarantee you that you will move first and hit reasonably hard with the vast amount of Pokemon that are weak to Ghost-type attacks. Banette has a nifty suicide strategy when it comes to using Trick Room. Leading with a Focus Sash equipped, Banette can use Trick Room on the first turn as the opposing lead attacks, and can proceed to use Destiny Bond, bringing down the lead with it. In this case, you are then free to switch in a Trick Room sweeper with a duration of 3 turns left.
Dusclops: Dusclops is a really reliable Trick Roomer thanks to its decent bulkiness. It's also not not weak to Bug-type attacks and can handle some Dark-type attacks to a certain extent. It's also capable of using Will-O-Wisp to drain the Pursuiter's effectiveness.
Exeggutor: Exeggutor is another Pokemon that has a terrible base 55 Speed, but has decent offensive stats which are base 95 Attack and base 125 Special Attack. It has access to two helpful moves that allow your Trick Room sweepers to switch in safley; Sleep Powder and Explosion.
Gardevoir: Gardevoir doesn't necessarily have a low Speed stat, sitting on base 80, but it has a lot of chances to set up Trick Room thanks to its ability Trace. It also has a great Special Defense and Special Attack stat, both sitting on 115 and 125 respectively, which help it further to improve its set up capabilities. It also has access to a ton of support moves such as Will-O-Wisp, Wish, Hypnosis, and the dual screens.
Grumpig: Grumpig is another Pokemon that doesn't have a low Speed stat, but it does have a decent Special Defensive stat and has the ability Thick Fat which makes it easier for Grumpig to switch in and set up. But, Gardevoir tends to outclass Grumpig because Grumpig sadly doesn't have any viable moves that help it further.
Lunatone: Lunatone is another reliable Trick Room set up Pokemon. It has access to Hypnosis and Explosion which can allow your Trick Room sweepers to come in unharmed and ready to sweep.
Slowking: Slowking is probably one of the best Trick Room users since it can set it up reasonably well, and sweep under it thanks to Nasty Plot. Having a grand base 110 Special Defensive stat coupled with base 95 HP and having a access to a reliable recovery move (being Slack Off) makes Slowking a prime Trick Room candidate.
Solrock: Solrock is quite identical to Lunatone, although it's at a slim disadvantage since it doesn't receive Hypnosis. Instead, it has Will-O-Wisp. It also has Explosion, which can once again help you bring in your sweeper unharmed.
Xatu: Xatu is one of those Pokemon that can set up Trick Room first, and then switch out last to bring in your sweeper unharmed. It's almost the same as Jirachi. It has Trick Room, Wish, and U-turn which really help it out when it comes to bringing in a sweeper. It also has a higher Speed stat which helps it achieve the first turn set-up and last turn switching.
Bronzor: Bronzong has a few little things that help it work decently as a Trick Room set-up Pokemon. The biggest thing is that it it's probably the best one that can set up Stealth Rock and Trick Room. The only disadvantage that it has is it doesn't have access to Explosion.
Porygon: Porygon is another Pokemon that can set up Trick Room and sweep under it like Slowking. It may seem to be weak, but it does have Download that can help improve it's Special Attack so it can hurt things with Tri Attack as it will do a reasonable amount of damage. It also has access to Recover which can make it survive slightly longer.
Pokemon that sweep under Trick Room
Camerupt: Camerupt can easily become a huge threat when it's capable of moving first. The reason is because it has access to a powerful STAB Eruption. Since it will be nearly at full health, Camerupt can easily take advantage of this and definitely hurt or OHKO many Pokemon.
Crawdaunt: Crawdaunt serves as a decent mixed attacker as it has base 120 Attack and base 90 Special Attack stats. It's dual Water and Dark STAB moves allows it 2HKO or even OHKO a lot of Pokemon that try to resist Water or Dark moves.
Kingler: Kingler also has a huge base Attack stat of 130 and has Swords Dance as well. It also has a really strong Water-type STAB called Crabhammer that can easily 2HKO many threats. Aside from Crabhammer, giving it Return and X-Scissor allows you to hit the entire metagame for neutral or super effective damage. Although it's Speed isn't really low, it's still capable of reaching a Speed stat of 139 assuming the IVs are at 0 and you are running a - nature, in this case, Brave.
Marowak: Reaching an enormous attack stat of 568 with Thick Club makes Marowak one of strongest, if not the strongest, Trick Room sweeper. Not only that, but it also carries Swords Dance, boosting its Attack stat to above the 1000 mark.
Medicham: Medicham reaches a high Attack stat of 480 with Pure Power and it has access to two really strong STAB attacks that is can use. It also has a wide type-coverage movepool that can help it sweep things without being as easily walled.
Rampardos: Having a gigantic base Attack stat of 165 definitely makes Rampardos worth using. Since Scizor is no longer here to revenge-kill this beast, Rampardos can dent teams easily. It also has Head Smash which it can use as a last resort which will most likely KO Pokemon that resist it.
Ursaring: Base 55 Speed and base 130 attack makes Ursaring a huge threat under Trick Room. Not only that, but it has the ability Guts and Swords Dance, meaning Ursaring can destroy teams with ease. It also has a decent movepool to work with, making Ursaring extremely threatening.
Wailord: Wailord works the same as Camerupt, but the only difference is that it uses Water Spout instead of Eruption. Even though it's not slower then Camerupt, it still has the potential to OHKO many Pokemon and become a massive threat.
Clamperl: Clamperl is probably the best sweeper under Trick Room on the special side, as it receives a significant Special Attack boost thanks to Deepseatooth. Surf can deal nasty damage and can severely hurt and quite possibly OHKO many Pokemon.
Munchlax: Munchlax may seem like a joke, but it has a very big movepool that helps it hit most of the NU metagame for super effective damage. Not only that, but Munchlax is the slowest Pokemon on the field, which will guarantee you to hit first assuming Trick Room is set up. It also has Thick Fat which can help it switch in on things easier and it carries Pursuit to hit those Psychic- and Ghost-types hard when they switch out.
Rhydon: This pokemon might seem inferior to Marowak at first glance, since it lacks an item that boosts its Attack. However, it does have a reliable STAB combo that is only resisted by Pokemon that are weak or take neutral damage to Megahorn. Not only that, but a massive base 130 Attack is not to be looked away from. It also has the ability to set up Stealth Rock if needed and can use its ability to its advantage by using Double-edge.
Trapinch: Trapinch has unique niche when it comes to sweeping under Trick Room; it's ability Arena Trap. This will allow Trapinch to easily destroy a Pokemon attempting to ruin your Trick Room set up Pokemon by switching into it, only to be trapped by Trapinch that boasts a max Attack stat of 328. The only downfall is the lack of type coverage in its movepool, but that doesn't really matter as Earthquake does an exceptional amount of damage while Crunch and Rock Slide hurt Levitators and Flying-types.
Trick Room Threateners
There are quite a bit of things that can stop Trick Room. To be more specific, there are six things that can potentially break Trick Room teams apart. Below I will explain what these six things are.
Flinching: Fake Out is a common move in the NU environment as there are many Pokemon that carry it, examples include Purugly, Medicham, Sneasel, Persian, and Kangaskhan (which can flinch Ghost-types due to its ability). Being flinched means that on turn of Trick Room has gone to waste, and when you have Trick Room set up, you have to take advantage of it as quickly as possible since you only have 5 turns to do so, including the part when it is set up.
Taunt: Taunt is probably the most threatening move to a Trick Room team. Any Pokemon that commonly carry Taunt, like Gligar for instance, can easily stop you from setting it up. If they stop you from setting it up, then you're left vulnerable to faster threats and can give you a really hard time to successfully set up Trick Room and deal some hard damage.
Stall: Stall is when your opponent uses moves such as Protect and Substitute to stall out your Trick Room time, commonly used by Jumpluff. It's definitely difficult to use your Trick Room team effectively when this happens, as you are left with a Pokemon that you will struggle with throughout the battle.
Priority: Priority won't stop you from setting up Trick Room, instead, it will hurt you. Pokemon that carry Priority moves, such as Skuntank, can really hurt many Trick Room sweepers as many of them are defensively frail. If your opponent has a Pokemon that carry priority moves, its best to remove them as soon as you can or else you'll be battling with unhealthy sweepers.
Checks: Checks are Pokemon that work well on standard teams, but can be used to Trick Room's advantage. What I mean by this is Pokemon that are naturally slow, like Munchlax for example, can be used to "counter" Trick Room teams as they can have the ability to move before you have a chance to attack which can once again leave you with KOed or unhealthy sweepers.
Pursuit: Pursuit is probably the biggest threat to Trick Room teams. More then half of the Pokemon that set this up are either Psychic-type or Ghost-type. With this being said, a fleeing Trick Roomer can easily fall into a Pursuit trap and can potentially be OHKOed, leaving you with one less Trick Room set up Pokemon and many more to fall into this deadly trap.
Ugh, I added so much stuff it seems like I just wrote an article.
