Of course the theme song of the uber-popular anime series is "gotta catch 'em all," and indeed, the collection of pocket monsters and completion of the Pokédex is what plays on the obsessive-compulsive personalities for which old-school gamers are known. The battles aren't particularly interesting because most any match-up is one-sided, and the story is pretty bland. After so many games, the world-building has reached a point where credulity is nearing the breaking point.
(Is every non-human living thing a Pokémon? What do people eat? How does an economy function where anything and everything has something to do with Pokémon? What about basic things like farming and manufacturing? And if every 10-year-old goes out to capture weird monsters for glorified cock-fighting instead of attending school, where do nurses, engineers, and other professionals come from?)
The battle animations, though revamped already for the first Black and White, are still basically NES-era Dragon Warrior. The sprites move slightly, and small effects take place. I know Nintendo's handhelds have always striven for gameplay over power, but this pseudo-animation is a bit weak for a 2012 RPG on any system.
With the main game finished, will I still pick up my DSi for a few more rare Pokémon hunts, some online trading, and a more complete Pokédex? You better believe it. Despite my nitpicks, this series is still quicksand for completionists. Stay far away if you don't have 40-plus hours to spare in the near future.
Pokémon: White Version 2 is rated E (Everyone) by the ESRB for Comic Mischief and Mild Cartoon Violence.