I hear mixed opinions. I haven't heard of any pokemon since Gen 2. I was thinking HG/SS but others tell me to get B/W2 --- PSN - TheAmazingNapkin "We all make choices, but in the end our choices make us." Andrew Ryan
Remakes (BW2, Platinum, HGSS) tend to be better regarded than the original game. Many reasons- some include a better post game, more polish, a better variety of Pokemon, more features, subtle improvements.
There isn't a huge difference between the version you choose, in terms of quality.
The games aren't very far apart in quality- the difference between an 8.85 and an 8.35 is quite slight. In other words, it's perfectly acceptable to have Pearl be your favorite game and BW2 your least favorite. I think every single one of these games has a 4.5 star average on Amazon. You can't go wrong with any of them- the only exception being that Platinum is as a whole regarded as a much more polished version of Diamond and Pearl (so that's the one advised). --- If I had a superpower, it would be the ability to defy logic.
Start with HG/SS to ease you into the new mechanics. Grab a cheap copy of Diamond or Pearl as well. (Cheapest of the more current games online) This way you have a large pool of new and old Pokemon to draw on for the next step.
Grab a copy of B/W 1, there are no returning Pokemon until after the E4 so you get to learn a lot about the new Pokemon without a crutch to fall back on. Post E4 you can bring all your old pokemon over into Gen 5.
For B/W 2 if you want to play them, I suggest breeding eggs of all the Pokemon you want to use and trade them over as eggs and use that team to play through the game.
After this you have a whole set of Pokemon and games ready to make the jump to gen 6 on the 3DS.
If you truly get hooked, grab a DS Lite and some of the GBA games (FR/LG, RSE) and have every gen covered. --- Know Japanese? Post your advice in the topic below! http://gamefaqs.com/boards/316-gamefaqs-world-japan/63714709