It's on at least one of the Japanese DVDs for the second movie ("Pokémon 2000: The Power of One" here in the US, "Gekijoban Pocket Monsters: Maboroshi no Pokémon X Lugia bakutan/Revelation Lugia" in Japan). I believe it's on both of the movie-only versions (e.g. the one in the mov.1-9 boxset), but not the one with the movie and its corresponding theatrical short on the same disc.