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 Blast)
Swampert (Surf, Waterfall, Earthquake, Blizzard)
Articuno (Ice Beam, Fly, Water Pulse, Mind Reader) [Mind Reader is only there until I figure out something better]
Leaf Green:
Latias (Psychic, Fly, Recover, Mist Ball)
Charizard (Flamethrower, Dragon Claw, Earthquake, Blast Burn)
Gengar (Sludge Bomb, Night Shade, Shadow Ball, Toxic)
Gyarados (Hydro Pump, Blizzard, Surf, Dragon Rage)
Golem (Rock Throw, Strength, Earthquake, Brick Break)
Persian (Body Slam, Double-Edge, Slash, Bite)
Emerald: (I only bought this recently and am still trying to beat the elite four... so once I do and get the National Dex, my team'll probs change)
Absol (Shadow Ball, Ice Beam, Slash, Aerial Ace)
Skarmory (Air Cutter, Fury Attack, Steel Wing, Fly)
Seviper (Poison Fang, Glare, Crunch, Earthquake)
Sharpedo (Crunch, Slash, Surf, Waterfall)
Mawile (Brick Break, Crunch, Strength, Rock Smash)
Blaziken (Blaze Kick, Slash, Ember, Double Kick)