: After Pikachu repels the Spearow, Ho-Oh drops a "Rainbow Wing" for Ash. The movie follows his quest to find Ho-Oh at Mount Tensei, guided by the mysterious Pokémon Marshadow .
: Though it is a reboot, the trainers seen in the opening battle are the same ones from the very first movie, Mewtwo Strikes Back .
: Unlike the original, Misty and Brock do not join Ash. He instead travels with new companions, Verity and Sorrel .
: In a controversial scene, Pikachu "talks" to Ash in human speech (childlike voice) to explain why he won't go in his Poké Ball: "It’s because... I always want to be with you".
: Director Kunihiko Yuyama noted that the Spearow flock was scaled up for the movie; while there were 50 Spearow in the original 1997 episode, there are 1,000 in the film.