Sailor Moon is almost killed against a very strong demon, causing Ranma and Ryoga to try and fight it. Ranma is chosen as the temporary replacement for Sailor Moon and transforms to defeat the demon. Ranma meets the other Senshi, giving them a power boost and Ryoga allows a silver millennium spirit share his body turning him into a moon pig advisor. When Ranma visits Usage in the hospital she is followed by the fiances and rivals, luckily they are scared away by the Senshi. (Sailor Moon Crossover.)