Here's what we've been talking about in the lab:
No Guard @ Leftovers/Focus Sash
~Gravity
~Spikes/Shadow Sneak
~Rock Polish
~Fissure
Takes a lot of setup, but if it pulls it off, it's bound to kill some stuff. Gravity ensures Fissure hits Flying-types and that Spikes damages them on the switch, plus Spikes break Sturdy. Rock Polish to outspeed stuff and then start Fissuring. Shadow Sneak can be used against Magic Guard sash (Alakazam) but might not be as useful. It's immune to Espeed/Mach Punch, too.
Adaptability @ Life Orb/Expert Belt/BlackGlasses/Lefties?
~Pursuit
~Sucker Punch
~Aqua Jet
~Substitute
Tired of Psychics and Ghosts ruining all your fun? Pursuit+Sucker Punch trap 'em! Substitute eases prediction. Aqua Jet for STAB. It's frail, but hits hard.
Sap Sipper/Scrappy @ Leftovers
~Espeed
~Rapid Spin
~Milk Drink
~Heal Bell/EQ
Switch it in as Sawsbuck Belly Drums and Espeed next turn. Sap Sipper for predicted Spores, Scrappy for Spin.
Rain Dish @ Leftovers
~Water Spout
~Rapid Spin
~Surf/Sludge Wave
~Protect
Offensive Tenta spinner. It can still do a good job at spinning but can hit hard with Rain-boosted Water Spout and gain back health due to Rain Dish+Lefties, keeping Water Spout relatively strong. Surf as needed. Protect to get back health for more Water Spouts.
Pressure @ Life Orb/Leftovers
~Hone Claws/Swords Dance
~Dark Void
~Icicle Crash
~Crunch/Pursuit
Loses lots of coverage and revenge kill prowess to function as a sleep inducer and sweeper with really good Speed and good Attack.