Earned the Guinness World Record for most advanced ticket purchase for an animated motion picture, coming in at 2,384,198 tickets. This is the second time the Pokemon franchise has made it into the book.
In the English language dub of the film, Arceus's line of "Prepare for Judgment!" as it uses Judgment is changed to "Prepare for justice!". This edit was very likely done to avoid a religious reference.
The director and producers went to Greece in August 2008 to use the country as a basis for the movie's fictitious setting. Among the locations they visited were the Acropolis, Mycenae, Delphi, and Meteora.
The longest solar eclipse in the 21st century was visible from Japan just days after the premiere of this movie, which uses the astronomical event as a herald of Arceus's approach.