It may not get as much exposure as Comes the Cold Dragon
or Ranma and Akane: A Love Story
but A Tale of Two Wallets
stands at the pinnacle of Ranma ½ fanfiction, especially in the Ranma/Nabiki pairing circle. Also crosses over with Sailor Moon
and Ah My Goddess
later on with cameo appearances from other series sprinkled here and there, but the story's focus is firmly on the Nerima Wrecking Crew, and the crossovers don't happen in force until a bit less than halfway through the fic's 128 chapters
I suppose it bears mentioning that this was essentially the first Ranma fic I ever read, so the Nostalgia Filter
is most likely in effect to some degree. However I still find it to be a very entertaining action/adventure series regardless of the criticisms, and my recommendation stands in spite of them.