Originally Posted by Fat barry4ever
I always thought Tyranitar was quite awesome in Ubers thanks to Pursuit and SS. I've been mulling about pairing up Mewtwo with Tyranitar since Tyranitar checks those annoying Shadow Sneak Giratina-O's and removes Mewtwo's most reliable check apart from revenge killing.
Most Giratina-o run Will-O-Wisp these days, so that will cripple your strategy!
Also, I'm pretty sure Rock Polish Groudon would break through this combo.