Why do people say roserade is so powerfull. Without hp fire registeel and regice totally pwn it. Also without hp rock/ice altaria/moltres pwn it so how is it #1?
It's Roserades versatility that allows it to fit on many different types of teams. On any team, it's ability to come in on bulky waters is excellent. For stall teams, it can set up Spikes/Toxic Spikes on plenty of things, including Chansey. On offensive teams, the Life Orb set brings a lot of firepower and the Scarf set brings some revenge killing potential. And the choice of Hidden Power is not hard, it's Sludge Bombs are powerful enough to knock off plenty of health from Altaria and Moltres anyway.
To sum up the tier changes, Crobat, Shaymin, and Umbreon are leaving, Dugtrio and Donphan are coming down, and Honchkrow is staying.
I have a feeling the tier will become a bit more offensive. Another potent wallbreaker is coming back to put dents in stall. Dugtrio will be useful for taking out key parts of stall teams.
Donphan actually adds quite a bit to stall teams, countering the Swords Dance/Taunt Drapion that stall teams had trouble with. Donphan counters it better than Steelix and Registeel ever did. A Rapid Spinner that can hit ghosts with a 100 base power dark attack off of 120 base attack will be great for both stall and offensive teams. I have a feeling many stall matches will be about taking out the opponent's ghost to keep down the entry hazards. Donphan also seems like an awesome counter to Honchkrow, taking all kinds of physical attacks and shooting back Ice Shards.