Nightman wrote:

Arg.

<Places 'dunce' cap upon head.>

What's the name of the fic where Ranma is left to be raised by the
Tendos, and Kasumi goes off with Genma and comes back Ranma-fied?

Nightman

The story line is "A Scary Thought" and can be found at:

http://www.fortunecity.com/lavender/attenborough/249/index.htm#ast