If you want a special-tank like clefable:
Clefable
~Calm Mind
~Ice Beam
~Thunderbolt
~*special move of your choice*
Would do EVs and all that, but I'm so dang tired...just know clefable is good only special-oriented. I think somebody above mentioned it, but clefable learns follow me, a useful double battle technique. Ploiwrath has better defenses than you'd expect, but still falls to Tbolt. It can do a lot of things, like be a belly drummer or subpuncher...and waterall for STAB and bulk up for more physical durability help too. When used right, poliwrath is nothing short of a monster. Hypno I re4commend as a special wall with CM, so that it can attack decently too, though when I say decently, that is what I mean...