3) This a question: Ryouga's shishi hokodan is a negative emotion attack, 

right? So, someone only needs to have negative emotions, right? Or does 
it specifically need depression? Or would sadness, anger, and rage work 
too? This is for a fan fict and I need to know. Oh, where did he learn 
this? From Cologne? And what is that shiryu thingy that Ranma learned 
from Cologne? Is is that cold/hot trick he got when Happosai weakened 
him? Thanks, all!<

	Ryouga was traped in a cave, he couldn't break out with the 
BaksaiTenketsu(Or however it's spelled), and he found a scroll explaining how to 
perform the shishi hokodan.