Mwahahaha I am the Normal Grass lord :D
I would specialize in Normal-types and Grass.
Togekiss @ Leftovers
Serene Grace
~ Nasty Plot
~ Air Slash
~ Roost
~ Baton Pass
(Nasty Plot and Roost as needed. Then sweep with Air Slash, and Baton Pass when needed, to either Ludicolo, Bibarel, or Roserade, depending on the situation)
Bibarel @ Expert Belt
Simple
~ Stealth Rock
~ Surf
~ Super Fang
~ Shadow Ball
(Hopefully, Bibarel will recieve the NP boost from Togekiss. Combined with Simple, it is supposed to be quite powerful. Plus the fact that a "OMG, I got KOd by a BIBAREL?!!?" reaction would be really nice.)
Ludicolo @ Damp Rock
Swift Swim
~ Rain Dance
~ Leech Seed
~ Ice Beam
~ Protect
(Made to annoy and stall, and possibly sweep in the rain.)
Roserade @ Leftovers
Natural Cure
~ Rain Dance
~ Weather Ball
~ Sleep Powder
~ Toxic Spikes
(After Ludicolo is done, Roserade is supposed to 1) Sleep the foe. 2) Lay some spikes. 3) Weather Ball like crazy.)
Breloom @ Toxic Orb
Poison Heal
~ Spore
~ Substitute
~ Focus Punch
~ Leech Seed
(Breloom is the last man standing. If all works as supposed, then Breloom can KO anything that switches in on it. With SR support from Bibarel, Toxic Spikes from Roserade, and adding SporeSubPunching with Leech Seed, this should be a nightmare.)
Whew, this took some time. - -'