Pokémon 3 the Movie: Spell of the Unown (2000)

Professor Shuri is a scientist looking for rare Pocket Monsters. He reads a storybook to his daughter Mi about the powerful Pokemon Entei. Shuri is currently searching for the heiroglyph Pokemon "Unknown". While searching through some ancient artifacts, Shuri awakens Unknown and is sucked into it. Mi next awakens Unknown while looking for her father. Unknown bonds with her and turns her mansion into a Crystal Tower. The crystallization begins to spread. Unknown lives to serve Mi and creates an Entei with the personality of her father to make her happy. When Mi next desires a mother, Entei kidnaps Satoshi's mother Hanako to give to Mi. Satoshi, Kasumi, Takeshi, and of course Pikachu set out to get her back.