Does anyone know where I can get a little Mp3 file of that ninja song in that ninja episode of Southpark?

You could try link

Hehehe! Let's Fighting Love! xD

Well, since Limewire's illegal, you could also go on YouTube and type in "Let's Fighting Love" and copy the video URL. Then paste it into vixy.net and select 'MP3' as the file you want. Then all you have to do it download it :)

Or you could just look at the clip here:
link

I have no clue, thats one of my questions

Let fighting love here are the lyrics though ^_^

UHHHHHHHHHHH NEVER MIND LOOK UP THE LYRICS I REFUSE TO WRITE THESE AHHHHHHHHHHHHHHHHHH

ok here it is
i have a wonderful pe**s
there is hair on my ba**s
is that the sound of a baby monkey
NO! Nijas are here!!
hey hey lets go getting in a fight
the important thing is to protect my ba**s!
i am badass,so lets get fighting
lets fighting love!! lets fighting love!
THIS SONG IS A LITTLE STUPID!!
it doesn't make any sense
ENGLISH IS ALL FUC***D UP!!
but thats okay we do it all the time
HEY hey lets go getting in a fight
the important thing is to protect my ba**s!
i am badass,so lets get fighting
lets fighting love!! lets fighting love!!!!!!!

(im japanesse so yeah it actully says that hehehhe)

nope but i wish i did