In the MCV UK magazine Issue #621 for January 21st, 2011, an advertisement for Pokémon Black and White has revealed that
Victini will keep its Japanese name for the English version. A Wi-Fi event will also be taking place to allow players to download the Liberty Pass and unlock Victini in the games. This is the same event that was in Japan last September. While the MCV UK magazine ad is specifically for the United Kingdom, its most likely that the Wi-Fi event will be available for all of Europe.
Advertisement Transcription
Get the mythical Pokémon Victini! Only for the 4th March to 22nd April. Meet the mythical Pokémon, Victini, with the Liberty Pass. Available for a limited time only! Pre-order to make sure you've got Pokémon Black Version or Pokémon White Version! The Liberty Pass will be distributed via Nintendo Wi-Fi Connection and at selected retailers. Start your pre-orders now.
Source:
http://www.mcvuk.com/digital-edition/download/225