The package will contain not only the swank Onyx DS with the Diamond and Pearl cover Pokemans, but also a DVD of an original animated feature based on Pokémon Mystery Dungeon: Explorers of Time and Darkness. To top it off (or, more accurately, to cover the top of it), there's a Dialga and Palkia DS case and a mini-poster.
How much extra do you have to pay for this package? How about none extra? The Limited Edition Pokémon Pack will retail for $130, just like every other DS Lite.