Camerupt

Mega Camerupt is a great Trick Room attacker thanks to a combination of high Special Attack, an excellent ability in Sheer Force, and stupendous Speed that allows it to underspeed and KO Amoonguss, a Pokemon that Trick Room teams have problems dealing with. Furthermore, Mega Camerupt's Fire / Ground STAB combination has great neutral coverage. This is complemented by the introduction of Guardian Deities that grant Mega Camerupt powerful coverage moves from Nature Power, enabling it to OHKO Water- or Dragon-types, which normally pose a problem to Mega Camerupt, if the right Terrain is up. However, Mega Camerupt is far less threatening outside Trick Room and requires heavy support from other Pokemon on its team. Furthermore, Mega Camerupt is weak to common Ground- and Water-types, and also struggles against rain.