HP Fire/fire weather ball would also mean being sort of walled by Salamence/Garchomp. And for weatherball, you'd need someone to perform a Sunny Day.
Extrasensory would mean that it'd be walled by steels like Metagross and Bronzong.
Roserade @ Heat Rock (whatever it's called...that prolongs Sunny Day)
Timid
Natural Cure
Solarbeam
HP Ice/Weather Ball
Sunny Day
Sleep Powder
We could try Breloom instead, but it has 4x weakness to flying.. and a weakness to pretty much everything you'd find on a typical 'good' team. (Ice, Fire, Psychic, Bug, Poison... bleh)
I still say we should use Roserade because... no one really uses grass types do they? They'd be extremely surprised if they sent out Garchomp or Salamence for type advantage...only to be crushed by a HP Ice.
We obviously wouldn't just leave it there against anything strong against it... (Fliers..switch to Metagross, Fires switch to special wall... etc..)
Dragons have a problem with a Bronzong... (just speculating a few potential replacements). I got this idea from the battle tower after like 50+ victories... It seems that my sweepers would always get torn apart by Bronzong's Trick Room...only to turn my special wall into a sweeper :S