I usually hate using Legendaries, but as you can see, I've loosened up recently. >_>
Ruby:
Sableye (Shadow Ball, Faint Attack, Psychic, Night Shade)
Zangoose (Crush Claw, Return, Slash, Rock Smash)
Mew (Mega Punch, Ancientpower, Psychic, Metronome)
Houndoom (Flamethrower, Smog, Crunch, Fire...