Squirtle - he ALWAYS (almost) pulls it out the bag and you never have to worry about type disadvantage. Plus he was basically the first one to invent "counter shield" without ash knowing it with the awesome way he does Hydro Pump! A very, very, very close second is Kingler - he has some AWESOME moves that are really powerful, like when they fought Misty at the whirl cup. His Crab Hammer was INTENSE and he only lost because Ash was arrogant and made him get close to Psyduck. DAMN EPIC!