Shifting models (a fan Rottmnt story/episode idea)

This is supposed to imagined to be like an actual episode from Rottmnt! It has my oc Kaela so no this isn't a Y/n x reader thingy- Basic concept is that Donnie creates a invention that turns the turtles into humans for a short amount of time. Donnie only made this for Leo. To learn why Leo wanted Donnie to make the i...