A Meloetta C-Gear entitled Night Sky Singing (よぞらのうたごえ) will be released on the Japanese Pokémon Global Link on July 14th, 2012 to coincide with the release of the 15th Movie short. A Meloetta C-Gear skin will be available for Pocket Monsters Black and White and it will also be available for Pocket Monsters Black 2 and White 2.

Source: http://ja.pokemon-gl.com/#/information/375

Dream World Gothimiru

A special Gothimiru (ゴチミル) will be available to be unlocked for those that enter a unique code that can be found in the Pocket Monsters Black 2 White 2 Official National Zukan Completion Guide (ポケットモンスターブラック２・ホワイト２　公式ぜんこく図鑑完成ガイド). The guide book goes on sale on August 9th, 2012 for 1050yen. The Gothimiru (ゴチミル) will be available on the Japanese Dream World and it has the hidden ability Shadow Tag (かげふみ).

Source: http://www.e-hon.ne.jp/bec/SA/Detail?refBook=978-4-8401-4635-7

Reshiram and Zekrom Dolls

The Pokémon Daisuki Club will be giving away passwords for Pokémon dolls featuring mythical and legendary Pokémon in their email magazine once a month. The first such password will be included in the July 20th "issue" and Japanese players will need to sign up before July 17th in order to receive it, if they are not already subscribed. The Pokémon dolls for July will be Reshiram and Zekrom. Our Dream World Furnishings page will be updated as the new dolls and passwords are revealed.