Pokemon Movie 03: Kesshoutou no Teiou Entei  

Pokemon 3: The Movie, Pokemon: Spell Of The Unown, Gekijouban Pocket Monsters: Lord of the UNKNOWN Tower ENTEI, Pokemon Movie 3, ポケットモンスター 結晶塔の帝王 ENTEI, Pokemon Movie 3: Kesshoutou no Teiou Entei, Pokemon: Kesshoutou no Teiou Entei

Mii Snowdon's father disappears while investigating a mysterious letter-shaped Pokémon called Unown. The only clue to his disappearance is a box containing several tiles. While playing with these tiles, Mii makes a wish to see her father again, which awakens the Unown and summons the lion-like legendary Pokémon Entei as her father. Meanwhile, Satoshi heads to Greenfield with Pikachu to meet his friends Kasumi and Takeshi. They are shocked to find that the place is crystallized due to the actions of the Unown. To restore Greenfield to its former beauty, they must defeat the Unown. The situation becomes personal when Satoshi's mother is kidnapped by Entei. In order to discover why his mother was taken away and rescue her, Satoshi, along with his friends and Pokémon, must travel through the crystallized landscape to confront Entei and the Unown.

The film chronologically takes place after episode 155 of Pokemon.