The Odds Are

Gravity Falls AU
Inspired by Sick by fanfics_loves
Somethings are different

Mason and Mable Pines are twins. Their mother was a hero and father was a villain. Some random rule made it so that any boys had to be the same as their father, and girls as their mother. Mason and Mable's father took this rule seriously, and shaped Mason into a villain. However, when Mason and his father are doing villainous things and his mother goes against them, Mason's memory is erased and he is raised as a hero. Only a few people accept him as one, while everyone else treats him as a villain. Their mother enrolled them in a school when they're sixteen, and it's a school for heroes. Mason tries to hide his powers, but he gets found out. What's more is that some villains want to get Mason back with them.