Dragonite

Dragonite's excellent all-around stats and large movepool may make it seem like a top-tier Pokemon. Unfortunately, Dragonite lacks a good and reliable STAB move, which hampers its offensive prowess significantly and makes other wallbreakers like Nidoking and Machamp some serious competition. Additionally, Dragonite's 4x Ice weakness is very exploitable for some powerhouses like Zapdos, Raikou, and once again Nidoking.

Nonetheless, Dragonite still has some perks that make it worth using. Its excellent offensive stats and its solid bulk and typing give it a much more favorable matchup against bulky threats like Snorlax, Vaporeon, and non-Ice Beam Suicune than most of its competitors, most notably Nidoking. Furthermore, its defensive stats coupled with its resistances and Haze make Dragonite a usable defensive Pokemon.