Aggron is a beast of a Pokemon ... That's an instant defeat for any Dragon-type Pokemon that faces off against Cloyster. Avalugg, and its Hisuian regional variant, have an impressive 184 Defense ...

However, when Radiant Greninja rotates out of the format along with Dialga VSTAR, the deck will need an alternate attacker, and Mega Aggron could fill that role. Steel-type decks usually have ...