VIDEOS:
Big Bad's Brother Phil
In "Goldie & Bear," the backstory of the Big Bad Wolf's brother Phil was that he was once even nastier and meaner than Big Bad himself. In "The Big Good Wolf," though, he explains that one day he found a trapped family of mice and accidentally rescued them and found to his surprise that it felt good, really good. Ever since then, he's been nice.
Example of:
Good Feels Good
Example of:
Growling Gut