PFFFFFFFT! What are all ya'll doin'?! Here is how it's done!
Troll Staller Set
Class name - Ya Boi, Quagsire
EV Spread, Nature, and Ability: 252 HP, 252 SpDef, 4 Def, (and the forgotten 2, if you get the joke) - Bold (+Def, -Atk) Ability - Unaware
Explanation: These spreads offer a great defensive layout for Quagsire, giving him a badly needed boost to SpDef, and a 10% boost to a decent Defense. 252 HP adds to both of these defenses, allowing it to be even tankier. Unaware is a good ability for a bulky Pokemon to prevent getting killed by a sweeper that has previously set up.
Explanation: Stockpile adds to his defenses even more, and Recover is to keep his health up. Toxic is to start dealing damage and stall out for KO's, and Scald is to cripple physical attackers, along with to damage Pokemon not affected by poison damage, but are affected by burn damage.