7/11 Japan has announced that it will be distributing a Wi-Fi download for Nintendo DS users throughout the 23 wards of Tokyo which features Pokémon + Nobunaga's Ambition (ポケモン＋ノブナガの野望). From March 31st, 2012 until April 13th, 2012, 'DS 7-Spots' (7SPOTでDS) at participating locations will allow Nintendo DS owners to download the temporary software and view a variety of content.

A quiz campaign allows players to do a quiz based on Pokémon + Nobunaga's Ambition. The quiz gives you one question a day in a multiple-choice format. Players that answer the questions correctly, then return to the same shop for more questions, can then get a sticker.

A special Eievui (イーブイ) password for Pokémon + Nobunaga's Ambition will also be revealed which allows players to unlock the Pokémon in the game. Usage of the password requires the retail version of Pokémon + Nobunaga's Ambition. A list of all the Pokémon unlock passwords is available by clicking here.

While not limited to DS 7-Spot locations, the Reshiram Event (レシラムのイベント) which allows access to Reshiram, the legendary Fire/Dragon type Pokémon, will also be available to download. Nobunaga's Dark Rayquaza (ノブナガの黒いレックウザ) for the Japanese versions of Pokémon Black and White can also be downloaded. These events can also be downloaded of the Nintendo Wi-Fi Connection.

Source: http://www.inside-games.jp/article/2012/03/28/55502.html