Mewtwo Strikes Back

Movie Mistakes

In the scene where trainers are using their Pokémon to fly to New Island a boy takes of on a Pidgeot. A few minutes later, Officer Jenny appears, and he takes off again on a Fearow.
One of the trainers claims that all his Pokémon are Water Pokémon. When he shows his team he has a Nidoqueen, which is a Poison/Ground Pokémon.
When the screen of the cloning machine is showing Pokémon silhouettes, the first Pokémon is Scyther, but Team Rocket says Alakazam.
During the fight between Ash and the tough trainer, the trainer throws up 5 or 6 Pokéballs, only 4 hit the ground, and only 3 Pokémon appear.
One kid says he rode over on a Pidgeotto, but it was a Pidgeot, anyway Pidgeotto wouldn't be able to carry a human.
In the battle at the beginning of the Movie, the trainer sends out several Pokémon, one of them is Golem, a Rock/Ground Pokémon. Pikachu attacks with Thunderbolt, knocking out all the Pokémon, even though electric attacks don't have an effect on Rock/Ground type Pokémon.
This isn't really a mistake, but when Pikachu's silhouette appears on the screen Team Rocket says "Who's that Pokémon?", even though they've been after it for so long.