The Pokemon Article of many things- by Angelica

1.The Pokemon website has had a revamp and you can watch any episode of pokemon you want
2.The Pokéwalker counts the number of steps you take as you walk around. The more steps you take, the more Watts you earn, which you can spend to find items and Pokémon!
When you transfer a Pokémon from your game into your Pokéwalker, you can select which Route you’d like to take your Pokémon along. Depending on which Route you take (such as in a grassland or by the sea), you’ll encounter different wild Pokémon and find remarkable items. When you first begin your journeys with the Pokéwalker, the list of Routes you can select from is short. But, the more you take a Stroll with your Pokémon, the more Routes will appear and the more Pokémon and items you’ll be able to get!

Find out more here: http://www.pokemon.com/us/news/vg_hgss_news_walker-2010-01-06/

3. There is a 3rd Pokemon Ranger game. I was looking through IGN when I found this. Its called Pokemon Ranger:The Path Of Light. http://uk.ds.ign.com/articles/106/1060881p1.html
In this, the reigion is called Oblivia