The Official Pokemon Global link website has updated with a promotion for two new C-Gear Skins. They feature the Pokemon Munna and Porygon-Z. The Munna C-Gear Skin is available for the Pokemon Black and White players in North America and many parts of Europe, while the Porygon-Z C-Gear Skin is available for the players in Japan.
To receive the Munna C-Gear Skin, you have to have the code featured in Pok√©mon Black & Pok√©mon White Versions Volume 2: The Official Unova Pok√©dex & Guide. If you don’t have that, then don’t worry. I have the code: PGLDR34M. The name of the skin is called Meadow Munna. No dates for this skin are available as of now, but when we find out the dates, we’ll let you know.
To receive the Porygon-Z C-Gear, you need to have gotten the book entitled ポケットモンスターブラック・ホワイト オフィシャルガイド 通信. You also get a chance to obtain a Porygon with its Hidden Ability and a Porygon2 D√©cor. The dates for this C-Gear skin are May 18, 2011 to April 26, 2012.
Source: The Official Pokemon Global Link (English) and The Official Pokemon Website (Japanese)