Koraidon

Koraidon is arguably the most impactful Pokemon in Ubers and is used on the majority of teams. Extremely high Speed and Attack boosted by Orichalcum Pulse and the high Base Power of its moves make Koraidon a nightmare to switch into. Scale Shot combined with Loaded Dice gives Koraidon the tools to break past would-be checks such as Ho-Oh without much trouble, leaving very few reliable checks to it; in fact, Koraidon's incredible breaking power makes dedicated checks such as Arceus-Fairy viable by its sheer presence alone. Despite Scale Shot Koraidon's attention-grabbing power, Koraidon's most used set is in fact Choice Scarf, which provides massive amounts of utility. It's able to revenge kill nearly the entire tier, clean up weakened teams with ease, provide momentum with U-turn, and serve as a pseudo-check to powerful wallbreakers like Extreme Killer Arceus, Kyogre, and Dragon Dance Necrozma-DM. Koraidon is somewhat held back by its reliance on moves like Flare Blitz, which has a lot of recoil, and Scale Shot, which can fail to achieve certain KOs should it miss or not get the right amount of hits. Furthermore, despite the lack of proper checks to Koraidon, it is often pivoted into by Pokemon such as Zacian-C, Flutter Mane, Kyogre, and Landorus-T, which can either absorb a Dragon-type move and KO back or cripple Koraidon through Drizzle or Intimidate. As such, Koraidon requires proper prediction to realize its full potential.