Nabiki finds out that Ranma is unclean due to bad ancestors and so everyone turns on him. He stop by Dr Tofu’s and is welcomed even after explaining, but the Dr tells him he would be better off out of Japan where nobody cares about what his ancestors did so Ranma joins the American army to gain citizenship and money. A few years later Liquid Snake takes over a base in Antarctica containing a metal gear with which he hold America hostage. Snake is missing so Roy Campbell cant send him in to deal with the threat however someone else had trained with Ranma and recommended he take Snake’s place, luckily Akane Tendo was stationed on the Island the terrorists had taken over and Roy could use that to persuade Ranma. (Metal Gear Solid Crossover)