What about Tri-attack with combined power of Foresight? I mean Tri-attack has 80 power, and it has a chance to make the target either paralyzed, burned, or even frozen. Yes I do know that it's not very effective against rock and steel types, but count those 2 out and you have a decent attack there....or at least that's what I think...
Another would be Facade cause how it doubles its power with the whole effect of burn, paralyze and poison thing. Combined that with a pokemon with Guts and you have a very, very powerful attack. Oh! And if the pokemon is normal holding a silk scarf! STAB, Guts power, Facade power, and Silk scarf power!
Oh! And if the pokemon is normal holding a silk scarf! STAB, Guts power, Facade power, and Silk scarf power!
Why a Silk Scarf? A Choice Band or Life Orb would boost the power more.
A choice band would prevent someone from using Protect or any other move that they might want to use. And I didn't consider Life Orb. Never really thought about the topic. Just the first thing that came to mind.