Well that's something I've always liked toying around with.  Anyways, 
here's a few examples.

1 Ranma/Gargoyles "crossover":  Actually the gargoyles don't have to show up.  I 
was just wondering, suppose it turns out that the reason Ranma's such an ace is 
because he's part elf (option one, Nadoka is one of Titania's handmaidens.  
Option two, Genma's grandfather was Oberon (Titania looks at Oberon who looks 
back and asks "Why do you think I took you and Renard so quietly?") Option 
three, both.)  It turns out that Ranma's been subconsciously taping his Magic 
side to boost his martial arts capabilities.

2.  Coyote, Loki, and Sun Wu-kung get together at Nekomi tech.  That's three 
gods of mischief in close proximity.

3.  Ranma becomes a vampire, then ~fifty~ years later uses the Nanban Mirror to 
travel back in time and try to prevent his embrace.

4.  Shampoo succedes in sliping a fully functional love potion to Ranma, only 
she doesn't realise that it only affects females.  Ranma gets splashed fighting 
Ryouga, and the potion kicks in.  The potion affects his female form but not his 
male form.

5.  Mega-Crossover:  Galus told how his tribe was pulled into El-Hazard by the 
eye of god, who might have been pulled through while it was acting 
uncontrolably?

	Just a few wierd ideas.  Later.
				Brendan O'Donnell