Global Trade Station

I'm trying to make an all d/p team and i was wondering, what would e the best defensive pokemon for my team.
I'm trying to chose beetween:

Dusknoir
item:???
nature: carefull
Moves:
icepunch
thunderpunch
firepunch
meanlook

elektivire
item???
nature:
Moves:
????
????
????
????

Ryhyper (did i spell it right?)

i would say dusknoir.
its used pretty much as a wall and like that
i would advise you to give it a healing move like pain split though.
Leftovers?

Electivire is an offense oriented pokemon.

Dusknoir is good but he needs a healing move.

Rhyperior is also reliable, but dusknoir I think has better capability.

What should i replace with painsplit?