Jynx

In terms of sheer wallbreaking prowess, few NU Pokemon compare to Jynx thanks to its amazing offensive typing, unique ability in Dry Skin, impeccable coverage, and access to Lovely Kiss, which allows it to cripple what it cannot beat. Thanks to its access to Psyshock and Focus Blast alongside respectable Special Attack, Jynx can bypass traditional checks to Ice-types such as Magmortar, Hariyama, and Piloswine, further solidifying it as an offensive powerhouse. Dry Skin allows Jynx to be among the few solid offensive checks to the ever-present Water-types in NU, most notably Samurott, Carracosta, and Floatzel, giving it a solid defensive niche. Additionally, Jynx's Speed hits a nice benchmark, letting it outspeed a good portion of the metagame, most notably Pinsir, Xatu, and Lilligant. However, Jynx is ultimately faulted by its horrendous defensive typing and terrible bulk, meaning it offers very little defensive utility and is awkward to fit on teams; this is further compounded by its weakness to Stealth Rock, limiting its opportunities to switch in. Furthermore, Jynx faces competition both as a Psychic-type with Mesprit, which boasts a useful defensive typing, decent bulk, and a unique support movepool including Stealth Rock and Healing Wish, and as an Ice-type with Aurorus, which hits harder due to wielding Choice Specs, while having access to Freeze-Dry, allowing it to wallbreak more effectively and eliminate Water-types. While Jynx does boast commendable Speed, it finds itself susceptible to many faster attackers and priority attackers such as Tauros and Kangaskhan due to its atrocious defenses.