Pokémon The Movie 2000: The Power of One (G)
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The second movie based on the TV series Pokémon. Before the main movie is the short film Pikachu's Rescue Adventure.
In the main movie, some evil pokemon collector captures Moltres and Zapdos and tries to catch Articuno, cuz having all three is somehow supposed to help him catch Lugia. But the weather gets all screwed up because of this and Ash and his friends have to try to make it right again. Ash is like this "chosen one" from an ancient prophecy, though it doesn't really seem to me like it mattered that he was the one who fulfilled it (although there was a decent pun about the world turning to ash).
Meanwhile, there was some girl named Melody who made Misty jealous, though Misty kept insisting Ash was just a friend. And Team Rocket tries to be heroes. And Professor Oak and Ash's mom and Professor Ivy come looking for everyone. And there was a talking Slowking for no apparent reason. And stuff. I dunno, it was kind of not that great, but it was okay. Plus the end credits had a few songs, one of which was "Polkamon" by Weird Al Yankovic, which was kinda cool. I should probably try to see the movie again sometime, and write a better review.