I use this to counter sand teams, specifiacally mons like Tyranitar and Excadrill.
Weezing @ Black Sludge
Ability: Levitate
EVs: 252 HP/ 124 Def/ 132
Nature: Bold
-Clear Smog
-Flamethrower
-Pain Split
-Will-O-Wisp
*Weezing is so amazingly bulky, it's a shame he doesn't get access to good recovery (I'm forced to use Wish). With the EV spread he has, Weezing can take a Swords Danced Return from Excadrill and still be able to not die from Sandstorm damage the next turn. With Clear Smog, weezing can stop any non steel Pokémon from setting up, and if a Steel Pokémon comes, then Weezing can take it out with Flamethrower, and possibly Will-O-Wisp for the likes of Excadrill and Metagross, though you can use it for regular physical attackers too. As for Pain Split, it's a very risky recovery move, so I always pair Weezing with a powerful Wisher like Vaporeon.*
Speaking of Sand Teams, meet the future of Tanks:
Gigalith @ Leftovers
Ability: Sand Force
EVs: 252 HP/ 4 Atk/ 252 Sp. Def
Nature: Careful
-Curse
-Stone Edge
-Earthquake
-Substitute/ Explosion
*Sand Force Gigalith is the most destructive weather tank in history! Due to it's Rock typing, Gigalith's Special Defence is a whopping 393 in Sand, and after only one Curse, it's Defence and Attack are 444 and 460, respectively. This makes Gigalith a very bulky attacker, not to mention the Ability: Sand Force boosts the power of Ground, Rock and Steel moves by 33%, giving Earthquake 133 BP, and Stone Edge 199, factoring STAB, coupled with 460 Attack, Gigalith can take out almost anything that doesn't resist is and has enough Bulk to take the hits for it. The last move is a sort of filler. Substitute blocks Burn which is deadly for Gigalith, and it lets him use more Curses, whilst Explosion gets rid of almost anything with it's 250 Base Power, and it lets Gigalith finish tanking with a BANG.*