I've been using a FWG core of Slowbro, Amoonguss, and Arcanine. However, it has a few twists.
EDIT: I guess this is more of a mixed core than a truly defensive one.
Slowbro @ Choice Specs Regenerator
Bold 252HP 252 Def 4SpAtk
A normal defensive slowbro but where status or a coverage move would normally go I run trick. This allows it to do a little more damage to opponents pokemon initially. Then when they least expect it (normally switching to something that counters slowbro) BAM they were just crippled with some shiny new specs. If he gets lefties then he plays like a normal slowbro; if he gets a life orb or choice item he can trick it to another poke later in the match.
Amoonguss @ Lefties Regenerator
Calm 252HP 4SpAtk 252SpDef
Normal Amoonguss set, has pretty good synergy with Slowbro; especially since both are essentially immune to hazards thanks to their nifty abilities. Amoonguss also absorbs toxic spikes which can greatly hinder slowbro's walling abilities. Clear Smog prevents him from becoming set up fodder.
Arcanine @ Life Orb Flash Fire
Jolly 252 Atk 4spdef 252 Spe
Yes I know this is an offensive Nine in a defensive core. His main purpose is to stop chandalure from ripping are bro and shroom. He can take a shadow ball, is immune to fireblast and deals heavy damage back with crunch. Extreme speed picks off speedy things that need to die, and morning sun provides mostly reliable recovery.
SS FC: 3439 0156 2549
White FC:1549 5311 6603
Last edited by czechm8; Jul 9th, 2012 at 1:07:47 PM.