Nicknaming in B/W then... Hoping the reset bag will work then. XD --- The Official ~Qing-Long~ of the Shin Megami Tensei IV Boards. Waiting for: Pokemon X, FE: Awakening, SMT4, DS2: Break Record, Soul Hacker 3DS, Youkai Watch.
No reason it shouldn't. EV-reducing berries work for transferred Pokémon in the fourth and fifth gens. Transfers are a lot like trading, and you can reset traded Pokémon's EVs.
I'm more curious what will happen to 255-EV Pokémon. Will they stay at 255 until their EVs are reduced, or will they automatically drop to 252? --- Creator of Jay's Journey (see quote!) "It's not ten years old! Therefore, it sucks!" - Nostalgia whores everywhere