Lucario doesn't learn Mach Punch. I'm surprised it's doing so well, whenever I try using Lucario I die before I set up or I see a Dusknoir and get burned. Hehe, I think I'm the one who used Zangoose in Uber. I've got no idea why things like Metagross and Bronzong are going down in usage. Metagross does a great job against Scizor, and Bronzong is a great counter to any Skymin that lacks Hidden Power Fire. Gyro Ball does loads to it.