Reshiram Duo/Trio Guide
Reshiram came out of the Gen 5 Movepool lottery in fairly good shape. While it received an underwhelming Dragon-type moveset in Dragon Breath/Draco Meteor, Fire Fang/Overheat is one of the best Fire-type movesets that Reshiram could have received. Fire Fang/Overheat combined with a massive Base 275 Attack results in Reshiram being the best Fire-type attacker in the game by a significant margin.
The Reshiram duo may be possible, even without Weather. Level 40 Dragon Tail/Outrage Rayquaza wins against Fire Fang/Crunch Reshiram in 575 seconds, or 287.5 seconds with 2 trainers, with 21 deaths (10.5 deaths per trainer). If both trainers have 12 maxed Rayquazas to enable the faster 'swipe' relobby, duoing Fire Fang/Crunch Reshiram without Wind will most likely be possible.
Most people don't have 12 maxed Rayquazas. For those people, the Windy Reshiram duo is much more achievable and realistic.
Because Reshiram can, on paper, be duoed even without Weather, the unboosted Reshiram trio is therefore very easy.
- Dragon Breath is boosted by STAB and hits Dragons for super effective damage, making it generally harder than Fire Fang to go against.
- Draco Meteor is boosted by STAB, has an incredibly high 150 base damage, and hits Dragons for super effective damage. If not dodged, Draco Meteor will oneshot any Dragon except Dialga, making it by far the hardest Reshiram Charge Move to face.
- If you are able to consistently dodge Draco Meteors, it will drastically lower the difficulty of fighting Draco Meteor Reshiram.
- Draco Meteor Reshiram is borderline impossible to duo with anything other than Level 40 Dialgas, unless you dodge Draco Meteors.
- Stone Edge is not boosted by STAB, but it is difficult to dodge and hits the Flying Dragons very hard. It's nowhere near as difficult as Draco Meteor, but Stone Edge Reshiram is still a very scary set to go against.
- Overheat is boosted by STAB and has high Base Power, but it comes out infrequently and is resisted by the top Dragons (except Dialga), making it significantly easier than Stone Edge and Draco Meteor Reshiram.
- Crunch has good neutral coverage and comes out frequently, but its Base Power is relatively low, it's not boosted by STAB, and is overall much easier than Stone Edge and Draco Meteor Reshiram.
- Windy boosts the power of your Dragon-type attacks. For people without 12 maxed Rayquazas, Wind is required for the Reshiram duo.
- Partly Cloudy boosts the power of your Rock-type attacks. Under Partly Cloudy, Level 40 Rampardos is capable of duoing all movesets except Draco Meteor.
- If you can consistently dodge Draco Meteors, Level 40 Rampardos becomes capable of duoing Draco Meteor Reshiram as well.
- Sun boosts the power of your Ground-type attacks. However, even under Sun, Ground-types are not capable of duoing, and Sunny-boosted Groudon still performs worse than the top Dragons due to how bad Earthquake is.
Reshiram Duo - Viable Counters
Minimum viable levels assume Best Friends, Windy Weather, no Dodging.
Italics indicate a Legacy move.
Level 40 Dragon Breath/Dragon Pulse Hydreigon is a little short of being duo-viable on its own, but high-level Rayquazas can put you ahead of the timer enough to use one or two Hydreigons without causing the run to fail.
Level 40 Dialga and Latios fall a little short of being duo-viable against Overheat on their own; if you have enough Rayquazas and Salamences carrying, you can afford to put in a few Dialga or Latios without jeopardizing your chances of winning.
The performance of the flying Dragons suffers greatly against Stone Edge, with an average of 26-32 deaths, or 13-16 deaths per trainer.
If you can consistently dodge Stone Edges, you can cut the death count down to 14-18 deaths, or 7-9 deaths per trainer, which allows you to avoid relobbying twice and drastically improves the overall performance of Rayquaza, Salamence, and Dragonite.
Dialga is only capable of consistently duoing against Fire Fang/Draco Meteor. Against Dragon Tail/Draco Meteor, Dialga requires extremely good RNG to win.
With dodging, Level 40 Latios falls slightly short of being duo-viable on its own; again, more Rayquazas, more leeway to use one or two Latios without causing the run to fail.
Reshiram Trio - Viable Counters
Minimum viable levels assume Best Friends, no Weather, no Dodging.
Italics indicate a Legacy move.
Trioing Reshiram is much easier than duoing it. The more Dragon-types you have powered up to decent levels, the easier this fight will be.
Palkia actually performs better against Overheat than Rayquaza, thanks to its 4x resistance to Fire.
The performance of the flying Dragons suffers against Stone Edge, but the Reshiram trio is still so relaxed compared to the duo that you don't need to do anything special to win against Stone Edge.
If you can consistently dodge Draco Meteors, Level 25 Palkia, Level 25 Latios, Level 30 Hydreigon, Level 30 Latias, and Level 40 Mud Slap/Bulldoze Mamoswine become viable for the trio.