I'd use a ton of Resttalkers and, if allowed, spam OHKO moves. I would use a lot of Quick Claws as well. Basically, I would destroy their prediction by relying entirely on luck.
. Your opponent has your computer hacked so that he knows what move you're going to make.
Let's look at it this way. Firstly, a Starmie with Surf/Thunderbolt/HP Fire/Ice Beam @ Leftovers.
Let's say you use surf against his houndoom. He, knowing the attack, switches to maybe Suicune to take the attack. You use thunderbolt, he switches to hippowdon. You use ice beam, he switches to suicide. Thunderbolt, hippowdon.
Basically, you force him to keep switching. He can't attack you, and despite the fact that it's not very effective,every bit counts.
Also, from the start of the game, take out hippo, use stealth rock. They can't counter that, and sandstream.
I think a lot of people are missing the point. The computer doesn't have access to your entire team roster and moveset, and isn't dynamically changing what's in unrevealed Pokeballs to adapt to the situation. So the point is to think about what sort of team you could construct to minimize the handicap of having your move or switch announced.
Let's look at it this way. Firstly, a Starmie with Surf/Thunderbolt/HP Fire/Ice Beam @ Leftovers.
Let's say you use surf against his houndoom. He, knowing the attack, switches to maybe Suicune to take the attack. You use thunderbolt, he switches to hippowdon. You use ice beam, he switches to suicide. Thunderbolt, hippowdon.
Basically, you force him to keep switching. He can't attack you, and despite the fact that it's not very effective,every bit counts.
Also, from the start of the game, take out hippo, use stealth rock. They can't counter that, and sandstream.
4 Exploders, Spiritomb to wall, Houndoom to finish opposing Ghosts and Steels with Nasty Plot and decent coverage. xDFill my team with exploders and dark types that can take care of ghosts.