Sheer Cold Artiuno doesn't work. It is to frail to survive many hits thanks to 4* rock weakness and the hax in the battle tower. Use smeargle instead:
Smearlge@Focus Sash
Jolly (If you can be bothered)
Spore
Lock On
Sheer Cold
Seismic Toss
Give Latios Psychic > Luster Purge, Ice Beam over Recover, and Thunderbolt over Arial Ace. This gives it amazing coverage. Psychic can be taught by the move relearner, and the other two moves are TMs that can be bought from the game courner. Just buy 20,000 coins and spend them on the TMs for Ice Beam and T-Bolt.
Lefeon must go. You could replace it with a good Physical attacker to go with Latios. Some examples:
Scizor@Life Orb
Adamant
Technician <--that's essentail
X-Scissor
Pursuit
Bullet Punch
Superpower
Or if you don't have access to platinum:
Metagross@Life Orb
Adamant
Meteor Mash
Earthquake
Explosion
Bullet Punch
Of course, if your lazy you can skip natures.
Smearlge@Focus Sash
Jolly (If you can be bothered)
Spore
Lock On
Sheer Cold
Seismic Toss
Give Latios Psychic > Luster Purge, Ice Beam over Recover, and Thunderbolt over Arial Ace. This gives it amazing coverage. Psychic can be taught by the move relearner, and the other two moves are TMs that can be bought from the game courner. Just buy 20,000 coins and spend them on the TMs for Ice Beam and T-Bolt.
Lefeon must go. You could replace it with a good Physical attacker to go with Latios. Some examples:
Scizor@Life Orb
Adamant
Technician <--that's essentail
X-Scissor
Pursuit
Bullet Punch
Superpower
Or if you don't have access to platinum:
Metagross@Life Orb
Adamant
Meteor Mash
Earthquake
Explosion
Bullet Punch
Of course, if your lazy you can skip natures.