Bumping this thread from the dark depths of Page 2 to post a core I've loved for awhile now:
Venusaur @ Life Orb
Ability: Chlorophyll
EVs: 204 Spd / 252 SAtk / 32 HP / 20 Def
Modest Nature
IVs: 0 Atk
- Energy Ball
- Sleep Powder
- Sludge Bomb
- Protect
Thundurus (M) @ Life Orb
Ability: Prankster
EVs: 252 Spd / 252 SAtk / 4 Def
Timid Nature
- Thunderbolt
- Thunder Wave
- Taunt
- Hidden Power [Ice]
Basically, what this core does it absolutely shit on Trick Room teams, especially leads. This is because of their access to Sleep Powder and Taunt, respectively, allowing them to prevent the opponent from using Trick Room, even if they lead with two users. Another nice thing is that they both have really nice coverage together, and can KO a lot of Pokemon when they double target, which isn't that hard to do once Venusaur has put Pokemon to sleep. Anyways, their isn't really much else to say about this core except for the fact that I've been using it on a team would be weak to Trick Room under normal circumstances, but these guys just save the day with their excellent supportive and offensive potential.