Kingdom Hearts 3D [Dream Drop Distance] is set to release in Europe on July 20, 2012. The European store "GAME" has revealed that they will be giving away a small bonus with pre-orders of the game-- a small Halloween Town-themed Sora dangling keychain. Thanks to KHDestiny, a photo of this offer in French can be seen below.
Update 1: Again, thanks to KHDestiny, we have received a photo of another pre-order bonus that will be given away by GAME in Europe. This is another dangling keychain, but this time, it's Cloud! You can see the photo of this offer in French below.
Update 2: Nintendo of France have officially announced this pre-order bonus, which is available for "select retailers". It is unknown if this will be exclusive to France, or will also be in other European countries. The good news is, Nintendo of France have supplied an image with this Tweet, and the image shows both Leon and Aqua in keychain form! This image can be seen below.