So, with all the talkof there not being any good Defoggers, I guess I will post a cool core I've been using down here.
Mantine @ Leftovers
Ability: Water Absorb
EVs: 248 HP / 164 Def / 96 SpD
Bold Nature
- Scald
- Toxic
- Defog
- Rest
Seismitoad @ Leftovers
Ability: Swift Swim
EVs: 200 HP / 252 Def / 56 SpD
Relaxed Nature
- Stealth Rock
- Scald
- Earthquake
- Knock Off
Clearly you'd pair Slurpuff, or another cleric, with this core due to Mantine having Rest. Basically, these two have incredible synergy with each other, and as well as with other walls in the tier: Ferroseed, Vileplume, Spiritomb, Slurpuff, and a couple of others. Seismitoad removes people of their Leftovers, Life Orbs, or choice items, which helps Mantine stall them out with Toxic+Rest, or burn if you'd rather that. Mantine is also reliable at Defogging, and easily switches into special attackers due to its monstrous Sp bulk. Mantine is also the cutest hoe in this joint.
Freeze dry?