"Sailor Ranko: Dive Into The Unknown" by Cheb
Set in Sailor Ranko universe. In order to save the light of Crystal Tokyo, Ranma and Akane will have to traverse a world totally alien to all their previous experience.
Not available at present, pending rewrite
Last posted location: http://www.fanfiction.net/u/615085/
Click Here to find the original story and other spin offs and related.