That article is five years old and the DVD has been out for just as long.
"Pokémon: The Rise of Darkrai" Movie Available Now on DVD
VIZ Media has announced that Pokémon: The Rise of Darkrai is available now on DVD. The tenth feature-length Pokémon movie puts Ash, Pikachu, and his friends in Alamos Town to confront the mysterious Darkrai, whose combat threatens to tear a hole in the space-time continuum.
For full details, read the press release here.