Hidden Power (Ground)
All are obtained and EV trained legitimately. Decent IVs. Latios has max Sp. Atk and Sp. Def (bottle capped, its Sp. Def was previously "no good") and if I get another Bottle Cap I may max out its "Decent" Defense. Landorus has max Speed. Volcarona's IVs are all very high but not perfect.
I don't know how good this set is, but it's not that great. Fast ice types like Frosslass and also bulky ones might get me unless I'm using Volcarona, as Rock Blast could easily miss, not be powerful enough etc.
In one of Verlisify's videos he talks about an exploit to get Bottle Caps really easily.https://www.youtube.com/watch?v=VUa6F7uGmKQ