Today was the start of the shiny Gengar promotion, which included the release of the Phantom Gate trading card game expansion, mega Gengar and shiny mega Gengar plush, and distribution start of shiny Gengar for Pokemon X and Y.
(The purple Gengars look like they have shiny fabric, but I think it’s just a side-effect of the ombré coloring.)
The ditto card was part of the Phantom Gate promotion - if you bought 1 box, containing 20 expansion packs, you would get 1 ditto card.
Pokemon Center exclusive Meowstic and Espurr card sleeves also came out today, and as I expected, they were incredibly popular. So popular that within 40 minutes after opening, the Tokyo Center had sold out.