A movie my friend remembers but doesn’t know

What he remembers is this:

There was a young female protagonist and an evil older slightly chubby witch. I BELIEVE the protagonist lived in a slum or type of town- the witch had a palace- at the end of the film. The witch got green faced and very sick and the protagonist took mercy on her and helped her

He watched it between 2014-2019

It had a similar art style to Disney like 1980-2010 kind but not poorly animated it was good animated

And it mustve been fairly popular as it was a channel film