Yes, it is. Many movies titled 'Mask' are based on real - life elements or people. For example, the 1985 movie 'Mask' was inspired by the true story of Rocky Dennis, a boy with a craniofacial disorder. His story of living with the condition, his relationships, and his positive attitude towards life despite the challenges were depicted in the movie.
Most likely not. Such stories often come from the imagination of the author or are inspired by various fictional elements rather than being true accounts.
In my opinion, 'Mask' is not based on a true story. It's likely the product of the author's imagination, crafted to entertain and engage the audience with a unique narrative.