I would still rather have Gardevoir. Psychic/Fairy High Special attack And ability to use Shadowball, and thunderbolt for extra type coverage, and MEGA evolution. P.S Champion has one so whatch out it will destroy you unless you prepare.
Mewtwo was so easy to capture, it took me 1 ultra ball with no status conditions. Also, Zygarde was a pain to catch it took me like 30 minutes to capture it, now i have to work on the legendary birds. YAY