Entei

With a plethora of coverage moves and a great Attack stat, Entei is easily one of the best Fire-type wallbreakers. To complement its Attack, Entei gets Sacred Fire, which has a 50% chance to burn the foe. Thanks to its base 100 Speed, Entei can outspeed Pokemon such as Hoopa-U, Diggersby, Nidoking, and Heracross. However, Entei can not utilize it to its full extent, as it is forced to run an Adamant nature when using Extreme Speed; this prevents Entei from Speed tying with other base 100 Speed Pokemon such as Kyurem-B, Landorus-T, and Excadrill. Entei makes up for this with its decent bulk, which lets it take non-super effective hits easily. Nevertheless, even with its great offensive stats, Entei is walled by a lot of physically bulky Pokemon. Entei is also weak to Stealth Rock, which can wear it down pretty quickly, and it has no form of recovery, which cripples its longevity even more. Furthermore, it provides no defensive synergy for its team.