Pokemon: The Movie 2000 (1999)

Factual error: In the opening short "Pikachu's Rescue Adventure," in the Bellossom song and dance shot, a Poliwhirl calls itself a Poliwrath. This is obviously a mistake because of the body differences between the Pokémon.

Trivia: The ancient legend in the tablet is very different in both versions. In the English version, it says that the Titans of Ice, Lightning, and Fire must be stopped by collecting the three treasures and awakening the beast of the sea, and the world will turn to Ash. In the Japanese version, it says that the God of the Sea will battle the Gods of Fire, Ice, and Lightning, and will fail, thus a superior master will rise up and save the world. The last line "and the world will turn to Ash." is not in the Japanese version, as Ash's Japanese name is Satoshi, named after the creator of Pokémon, Satoshi Tajiri.

Question: This is supposed to take place roughly around the episode Charizard Chills Out (either before or after). Tracey meets Professor Oak, but in episode "The Underground Round-up" he says "I can't wait to get to Pallet Town either Ash, to meet Professor Oak" like the movie never actually took place. Also, Ash could have given Professor Oak the GS ball at that time. When really does the movie take place? As Ash still has his Lapras, which he releases in the previous episode.