It was released in a special pack which had 6 DP series boosters and holos of POP6 Chimchar, Piplup and Turtwig as well as new holos of Bebe's (MT), Cynthia's Feelings (LA) and Professor Rowan (DP).
It also had three coins which had the Sinnoh starters in blue green and red.
Don't remember exactly when it was released but it as a little while ago. And was big since the boosters were spread out.