I'm currently trying to beat the Elite Four and my team is Roserade, Arcanine, Starmie, Golurk, Lucario, and Zoroark. I just caught a level 48 Zweilous in Victory Road and was wondering if I should use it instead of Zoroark. I know that I'm probably not going to be evolving him until post-game, but is he any good before he evolves? Or should I just keep him anyway so I can use him later? Or just keep Zoroark?