In the film, Molly is a grieving girl who recently lost her father in an archeological accident, kidnapping Delia Ketchum with the help of Unown and the newly-born Entei as a way of coping with her loss, prompting Ash Ketchum to pursuit Entei and save his mother.
On the outside, Molly seems to be arrogant, cruel and selfish who only cares for herself, but deep down she is a kind-hearted young girl who loves her father and does care for her friends, she is also shown to be very remorseful after she realized what she has done.
Despite her young age, Molly is also shown to be brave, such as not being scared of Entei when he first appears and instead recognizes him as her "Papa".
As a teenager, Molly's hair has grown much larger in addition to becoming a lighter blonde and reaches her shoulders, her dress is a darker shade of blue with a white coat-like cape over it, her bow is worn on her neck and she doesn't wear socks while her boots have become a darker shade of brown. In addition, Molly's voice becomes lower and more mature sounding. She also wears a pair of black-and-white, yo-yo themed earrings.
