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Zapdos appeared in the second feature length Pokémon movie, The Power of One.
Zapdos, as depicted in an ancient legend, is the titan of lightning. Lawrence III was trying to capture the three legendary birds to bring out Lugia. Lawrence captured Zapdos along with Ash, Misty, Tracey, Melody, Jessie, James, and Meowth. Zapdos was freed by Moltres and the two birds burst out of the palace.
The three legendary birds then started a huge fight. When Lugia came up from the sea, Zapdos worked with the other birds to put Lugia back where it came from. Later, Lugia rose again and none of the birds seemed to notice at first.
After that, Zapdos kept fighting with the other birds but it returned to its island after Ash and Lugia silenced their fighting.
Moves used
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For more information on this Pokémon's species, see Zapdos.