Latios @ Lum Berry
Evs: 252 sp attack, 252 speed, 4 special defense
Modest Nature
-Calm mind
-Psychic
-Thunderbolt
-Ice beam

Metagross @ Choice Band
Evs: 164 Hp, 252 attack, 90 speed
Adamant Nature
-Meteor Mash
-Earthquake
-Shadow ball
-Explosion

Swampert @ Leftovers
Evs: 252 Hp, 252 defense, 4 special defense
Relaxed Nature
-Surf
-Earthquake
-Ice beam
-Protect