- Roserade is receiving errata for its Poke-BODY, "Hidden Poison". Hidden Poison affects your opponent's Attacking Pokemon, not your Defending Pokemon. The correct card text should read, "If Roserade is your Active Pokemon and is damaged by an opponent's attack (even if Roserade is Knocked Out), the Attacking Pokemon is now Poisoned."
Source:
Organized Play News (2008-11-07)