Studio BentStuff published the Dissidia Final Fantasy Ultimania α as the initial reference guide for the game. Released on December 4, 2008, this book became part of the Ultimania series, which includes the Kingdom Hearts Ultimania α.[32] Suntory Ltd. also collaborated with Square Enix to create the "Dissidia Final Fantasy Potion" drinks which were released on December 9, 2008, in Japan to promote the game's release.