>>25089073I caught one in HeartGold and she's great. Fast, hits hard, and has a ton of coverage moves. I run Ice Beam, Focus Blast, Shadow Ball, and Psychic on mine in that game, and there are even options that you can use depending on what you need.
In ORAS mine for competitive is Nasty Plot, Ice Beam, Focus Blast, and Psyshock, with a Life Orb.
You've just gotta keep it away from Sucker Punch unless you're running Sub, and like another anon said, pretty much all physical moves in general as well.