Pokémon 3: The Movie - Spell of the Unown (2001)

When Me Snowdon's sadness of her father's disappearance get to her, she unknowingly uses the Unknown to create her own dream world along with Entei, who she believes to be her father. When Entei kidnaps Satoshi's mother, Satoshi along with Kasumi & Takeshi invade the mansion looking for his mom and trying to stop the mysteries of Me's Dream World and Entei!