Yveltal

With a good offensive and defensive typing and an extensive movepool, Yveltal is a premier threat in the Anything Goes metagame. A decent base 99 Speed stat allows Yveltal to outspeed the cramped base 90 Speed tier and more, notably getting the jump on Primal Groudon, Primal Kyogre, bulky Arceus formes, and Zygarde, while also Speed tying with Xerneas. Its other stats are also very well-rounded, allowing it to run a plethora of sets, with good offenses in conjunction with Dark Aura and reasonable defenses allowing it to run defensive sets. Its ability to viably utilize a multitude of sets allows it a degree of unpredictability and forces opponents to proceed with caution. Its STAB combination allows it to beat a large number of Pokemon, like Marshadow, Lunala, and Necrozma-DM. However, Yveltal has a weakness to Stealth Rock, the most common entry hazard in the metagame, meaning that it can be worn down quickly, as well as further weaknesses to Rock and Fairy, which are common offensive types. Its unfavorable matchup against popular picks such as Arceus-Fairy and Arceus-Rock means that it will require some team support. Base 99 Speed, while decent, is not enough to outrun some of the biggest threats of the metagame, including Ultra Necrozma, Mega Gengar, Marshadow, and Mega Rayquaza, which means that Yveltal will require a Choice Scarf to outpace these Pokemon. Yveltal is also setup fodder for many Calm Mind Arceus formes and other Pokemon like Xerneas when not using Taunt.