By the plot gods have it so Ranma Saotome and Akane Tendo switch, the child their mothers gave birth to is switched, with them being raised by them, the only thing for sure is that they still have their first names: Ranma is now being Ranma Tendo and Akane now being Akane Tendo.
Before they meet if at all how different are they when they first meet? How is Ranma under Soun Tendo and his wife? How does he handle his two sisters, what is their relationship? How are his skills as a fighter? How is his relationship with his father and mother? How is he with the others in town? How does Akane do under Genma and his wife? How different is she? How is her relationship if any with Ryoga? Can she cook?
First Scenario: Same as above.
Second Scenario: Ranma is a girl.
Third Scenario: Akane is male while Ranma is a girl.
Fourth Scenario: Both are male.
Fifth Scenario: Both are girls.