Pokemon Heroes: Latias and Latios

The fifth installment of the phenomenally successful POKEMON series takes place in a mysterious city on water. Set against a baffling maze of canals and alleyways, Ash, Pikachu, the rest of the gang take on a slick new pair of thieves in this glamorous, high-stakes adventure story. The film introduces two new Pokemon characters -- Latias and Latios, who possess strong psychic abilities and the power to disguise themselves as humans! (official distributor synopsis)