A recent Ranma crossover: Voyages of the Wild Sea Horse

[Cheb]

These days, new Ranma fics are rare. Finding a good one, alive and growing, is a miracle.

Miracles happen:

Voyages of the Wild Sea Horse by rewind gone nuts
Basically, a tried and proven plot device of "magic item gone wrong" lands Ranma, the fiancees, Nabiki and Ryouga in the One Piece world.