Start/End Dates	2012-04-28 through 2012-05-06
Country	Japan

Details

To celebrate Golden Week in Japan, the Pokémon Searcher BW (ポケモンサーチャーBW) was held at the Nagashima Super Dome in Nagashima Spa Land, Mie Prefecture Kuwana City from April 28, 2012 until May 6th, 2012. The second annual event featured a new storyline where participants were to find the Water Jewel (みずのジュエル) which had disappeared. Players used the analyzer (アナライザー), a dedicated terminal to help investigate the jewel's disappearance. The Pokémon Searcher BW entry fee was 1000yen and a separate entrance fee was required to enter Nagashima Spa Land.

A special Pochama was also be distributed to participants of the Pokémon Searcher BW event. This Pochama is special as it knows Hydro Pump at level 15. It normally cannot learn that move until level 43. Players could bring their Nintendo DS and a copy of the Japanese version of Pokémon Black or White in order to receive this Pokémon. This Pochama cannot be traded over the Global Trade Station.

Sources: http://www.pokemon.co.jp/info/2012/02/120224_e01.html and http://www.nagashima-onsen.co.jp/data/pokemon/privilege/index.html