My battle tower team is:
Metagross
+attack, -spattack
Zen headbutt
Thunderpunch
Earthquake
Meteor mash
Heavy hitter, maxed attack and speed evs, he gets hard almost anything ive seen. Almost impossible to OHKO from what ive seen.
Tyranitar
+speed, -spdefence
Thunderpunch
Icepunch
Earthquake
Stone edge
The backup. Has ice punch and earthquake to deal anything that took out metagross by chance. Havent, but am thinking of redoing and ev training
Heracross
+attack,-spattack
Superpower
Stone edge
Mgahorn
Swords dance
Maxed attack and speed again, i use him to counter any dark, psychic, and fighting types that ruin tyranitar. Thanks