Reshiram

Although its dual STABs are notorious for being unresisted, Reshiram's reliance on weather, lack of defensive utility, and susceptibility to hazards make it a lesser player on the Ubers scene. Additionally, Reshiram has to compete with Kyurem-W for the position of "Dragon-type special nuke." In the minds of many, Kyurem-W's extra power, better Speed tier, and lack of weather dependence overshadow the ridiculous power of Reshiram's sun-boosted Blue Flare. The introduction of Regenerator Ho-Oh causes more problems. If Stealth Rock isn't up, Ho-Oh can now switch into a Choice Specs Draco Meteor and switch out to a resist on the second hit; any other move on the Choice Specs set—save for the uncommon Stone Edge—can be easily weathered by the flaming turkey. Taking into account all of these drawbacks, one might wonder if there is any reason to consider using it in BW2.

Fortunately, Reshiram's combination of Roost and Tailwind means that it can step outside of its traditional nuking role and provide support for its team. This is augmented by Reshiram's superior defensive typing, which allows it to stand up to sun-boosted Fire-type attacks, Genesect, and Ferrothorn—all things that threaten Kyurem-W immensely. That said, Reshiram's defining factor is its massively powerful Blue Flare. After the boosts from sun and STAB, Blue Flare hits 292.5 net Base Power; with the exception of Kyogre's Water Spout, it's the most powerful commonly seen special attack in Ubers! Reshiram's Dragon-type STAB also comes in handy for hitting the multitude of Fire resists in Ubers, giving Reshiram an edge over Ho-Oh against Kyogre and Giratina. Altogether, Reshiram is a versatile, powerful threat that one would be foolish to dismiss the viability of.