Here are a few possibilities that come close:
* The Little Mermaid: While Ariel's mother, Queen Athena, doesn't have a huge role, she is present throughout the film and plays a significant part in Ariel's journey.
* Brave: Merida's mother, Queen Elinor, is a central character and very present throughout the film, though their relationship is complex and tested.
* Lilo & Stitch: Nani, Lilo's older sister, essentially acts as her mother throughout the film.
* Moana: While Moana's mother is not alive, her grandmother plays a crucial role in guiding her and is a constant presence throughout the film.
It's important to note that the definition of "mother" can be interpreted in various ways. Some films may have a mother figure, but not a biological mother.
Can you give me more information about what you're looking for? Do you want a film where the mother is a central character? A film where the mother is actively involved in the protagonist's journey? This would help me narrow down the possibilities.