Recently I've been using Hammerlock, my Clawitzer.
Assault Vest
Ice Beam
Aura Sphere
Dark Pulse
Water Pulse
Gotta love the mono water typing and the assault vest lets the glass cannon take a couple of thunderbolts or energy balls with relative ease, then retaliates for a OHKO or at least make them regret staring down the barrel of a Mega Launcher!
Of course he is just one of many hehe, need to always try other leads as you never want to be too predictable.