Pokémon Bank
This is the big one everybody has been waiting for. We have always wanted to have the ability to trade our Pokémon with others around the world, without them being physically present next to you, and this is exactly what they have given us with this new concept. The idea of Pokémon Bank is simple; you have your own cloud storage facility in which you store your Pokémon, and with this, it allows other players to take your Pokémon from your box and add them to their party. There are so many positives to this implementation, not only in terms of evolutions, but it can also become a cornerstone to how you choose to take on every battle, and which Pokémon you intend to raise. For example, you may be against a tough Gym Leader who might use a type which puts your party at a serious disadvantage, and as a result you would normally have to spend some serious time catching and leveling up a type which could combat against it. With Pokémon Bank, you could have a friend who has gone a different route with their party, and have some Pokémon which would be strongly suited against your opponent. He or she could loan you that Pokémon for not only your gain, but theirs by gaining XP. Another route would be to go and grab some of your Pokémon from Black & White and with the use of Pokè Transfer, you can use some of your favourites from the previous generation. This feature will be available in Japan around December, with US & R.O.W receiving it at a date not too far in the future.