コロコロ Information

Well more info has come from CoroCoro focusing on the WiFi features. Thanks to Coronis for assistance on translation:

* The Underground world of Shinou mentioned before appears to be a co-operative area where you link up with a friend (Over Wireless and WiFi) and search for items and Pokémon, tackling puzzles enroute. Fossils are primarily found here
* The underground area is also where the secret bases are situated and there is a game called Flag Retrieval. Each person has a flag in their secret base and when connected you need to go to your friends base and retrieve their flag. There are Rocks and Leaves and many other traps that can slow you down or stop you on that route
* The Battle Tower makes a return with global WiFi battling in a special WiFi Battle Room
* There is a Global Trade Station where you can meet up with people online around the globe and trade with people.
Currently it is unknown if the Global Trade Station & Battle Tower require Friend Codes, but considering there is a WiFi Center in each Pokémon Center, it is likely that these are random battles & trade hunts.