A sweet steel type gym idea, if anyone wants it (up to 5th gen.)
Main - Aggron
This would honestly be hard as poop to beat.
Anyone can send a battle request anytime! (sorry Mega-Absol. always on at the wrong time)
I know this isn't a thread for posting strategies, but a mega-Aggron may beat Charizard y with head smash or even rock slide. then again filter helps and even a sturdy aggron would be a sacrificed pokemon.
Hey, Probopass or even ... that weird sword pokemon could be useful. also, Durant? other then Scizor and Escavalier? Rise of the Klefki! I may hate that pair of keys but that doesn't mean it isn't useful. Probopass and Klefki can help lay down some spikes of stealth rock, which would help clear out fire types. OH, but there's no Excadrill? really? even that magnezone looks terrible against a sword danced Excadrill.