Terrakion

Terrakion is a fearsome wallbreaker that can decimate balance and stall teams thanks to its amazing STAB attacks that offer it almost perfect coverage alongside great natural power, cementing itself as a popular threat on offensive teams. After Mega Evolving with Lucarionite, Terrakion can single-handedly break through most walls in the tier, while Diancite enables it to outspeed the majority of the unboosted metagame. Thus, Terrakion is a difficult threat to check both defensively and offensively. Terrakion may also run utility options such as Swords Dance, Stealth Rock, and Taunt or even change its typing entirely by running Pinsirite, further enhancing its capabilities in disrupting the opposing team apart from simply wallbreaking with its STAB moves alone and preventing usual checks such as Primal Groudon and Buzzwole from withstanding its attacks. However, Terrakion is susceptible to most forms of priority due to its low defenses, especially when holding Diancite, meaning it can often be forced out by offensive threats such as Zygarde and Entei. An unfortunate weakness to common types such as Fairy, Ground, Fighting, and Water leaves Terrakion unable to switch in against most offensive threats, while Pinsirite variants' susceptibility to Stealth Rock means they can have limited opportunities to come in safely. The presence of common bulky threats such as Manectite Magearna, Arceus-Fairy, and Lunala also hampers Terrakion's capability to break through balance teams, since they can threaten Terrakion with an OHKO if they have not been worn down a bit in advance or if Terrakion is unable to acquire a Swords Dance boost. As is the case, Terrakion may require some additional support from its teammates at times to perform its role; however, it can still apply enough offensive pressure on opposing teams to independently dismantle most defensive cores regardless.