Heracross

Heracross's great Attack stat coupled with its ability Guts makes it a strong physical wallbreaker. With its access to Close Combat as a good Fighting-type STAB move, Swords Dance to set up, and coverage moves such Knock Off and Facade, Heracross can be very difficult to switch into, being able to break through defensive cores and bulky teams with ease. Also, its Bug / Fighting typing allows it to soft check Ground-types such as Krookodile and Hippowdon. Despite all those good qualities, Heracross has a lackluster Speed stat and no access to strong priority to be a decent offensive Pokemon, making it easily revenge killed by a lot of faster offensive attackers such as Mega Aerodactyl, Latias, and Mega Pidgeot. It also lacks reliable recovery and access to Drain Punch, leaving it prone to being worn down by burn damage and entry hazards.