So... GSC revamp! Finally! Timing couldn't be more perfect since my Goldgame died some weeks ago...
In my opinion, the johtoregion is the best of the four. It has great pokémon, the story is good and not too complicated, and being able to go to Kanto really finishes it!

In HS and SS the pokemon who's first in line will be walking behind you, just like your pikachu in Yellow. I've always loved this feature, yet hated that it was only Pikachu who'd stalk you all the time. Now it can be any Pokémon! Imagine a huge Onix backing you up, ha.

And The Pokéwalker... I don't know what to think of it. Ofcouse, it's great to be able to train your pokémon without having to turn on your DS, but I wonder how fast is goes... Just like in the game, 1 Exp. per step? That's alot of walking, I think I'd prefer the in-game daycare over the Pokéwalker.

For more information check [link] Serebii.net. I'm to lazy to type more and I just wanted to give my opinion. XD