Today's the last day to download a free shiny level 100 Dialgg from Gamestop on Pokemon Black, Black 2, White and White2. Go there, turn on your game, use the mystery gift option and search for a local connection.

Starting tomorrow, there will be a shiny level 100 Palkia available the same way. I forget the end date for that one but after Palika ends you will be able to get a shiny level 100 Giratina.

I didn't even have to enter the store to get mine, the signal was available all the way out to the parking lot. I was at Gamestop on Friday and saw the sign, but i didn't have my DS with me. Took it yesterday and got my free pokemon.