Primeape

Primeape is one of the most dangerous physical attackers in the metagame. Boasting an astronomical Attack stat, a great Speed stat that ties it with Xatu, and a powerful STAB Cross Chop backed up by solid coverage, Primeape makes for a great choice for wallbreaking or cleaning on many teams. Furthermore, that same Cross Chop comes with the coveted trait of being super effective against the common and dominant Normal-types, potentially OHKOing threats like Stantler, Persian, and Porygon and dealing massive damage to Wigglytuff; it also takes a heavy chunk out of Dewgong, Sudowoodo, and Graveler. Cross Chop even has a potentially game-breaking increased critical hit rate that can slice right through a Wigglytuff or Porygon that has used Curse several times. However, Primeape has some very debilitating issues. Move accuracy is its biggest problem, turning what would otherwise be KOs from Primeape's Cross Chop or Thunder into potentially unreliable tools. Primeape is also plagued by the presence of Xatu, Fearow, and Weezing, three of the best and most common Pokemon in the tier, which are all great answers to it. Primeape is also quite frail, having difficulty switching into its targets repeatedly, so it can be difficult to find entry for it. Primeape is also easily revenge killed by Fearow and Xatu after some chip damage.