Originally Posted by Fat R Inanimate
Play by Sucker Punching Archeops, activating Defeatist, and switching Zapdos for Meta.
The Sitrus Berry would reactivate Defeatist though, wouldn't it? I believe an unboosted Sucker Punch falls short of 75% damage on Archeops (correct me if I'm wrong).
Still I probably would have the same thing, though Metagross would not have liked Archeops's Earthquake. That really is a tough situation since Sucker Punch can't KO either lead without a crit. Maybe the best strategy would be to sacrifice Zapdos to Stone Edge and have Bisharp Iron Head one of the leads to death (Aerodactyl is probably safer due to it not having Protect and Bisharp can fall back on Focus Sash to survive Archeops's Earthquake). Then Metagross comes in for free. Archeops's Protect is so shitty though since you never know when it's gonna pull that out.
That would lead to you losing Zapdos and probably Bisharp too and locking Metagross into Bullet Punch for the other lead isn't ideal. Not really a good situation. You'd have to hope that Latios and Metagross's Bullet Punch could kill the last 2 pokemon :/
Still, maybe Archeops predicted Rock Slide flinch hax and decided to use that instead lol.