the Tropius is cool. I've been pondering one with Yache/Natural Gift. A possbility to slash in over Lum/Rest, maybe?
Murkrow @ Eviolite
Calm, Prankster
248HP / 8Def / 252SpD
- Roost
- Featherdance
- Protect / Toxic
- Mirror Move / Night Shade
An absolute monster to take down, barring one good SE hit after a roost. I've used this in a few battles already (sans Night Shade) and it has lasted amazingly long amounts of time.
Roost and Featherdance are the coup de gras of this set. Priority Roost really needs no explanation, and Featherdance allows the EV spread to focus exclusively on the Special Defense aspect.
Protect lets you scout, but it can easily be replaced with Toxic, Taunt, Haze, or even Torment/Substitute in a pinch (as a combo with Slot4, obviously)
Last slot is primarily tech. I had good luck with Mirror Move, allowing me to copy my opponent's attacking moves after scouting out with a Protect, but if you're not using Protect, I'd advice against Mirror Move. Night Shade prevents you from being total taunt bait, but basically anything that could fit into slot3 could fit into slot4 (excepting Protect/Mirror Move, and Torment/Substitute, obviously. I'm also considering testing Perish Song/Mean Look).
Murkrow is best suited for a defensive team, and REQUIRES trap support. Toxic spikes is an absolute must, and a little burning would be nice too, in case of fliers/levitters/steels/poisons, but it's not nearly as important as toxic spikes.