Actually I have a few for Riddick... there would be http://hp.adult-fanfiction.org/story.php?no=600025853 by I-Am-A-Slash-Addict
It's about Harry being a sub-Nekomata and Riddick being his mate. Ginny can't really believe that Harry is not her mate and tries to prove to him that she is the one. But with a spell gone wrong Harry, Remus and Sirius are transported to the planet (forgot the name, if it had one anyway X3) just before the ships crashes on it.
So far four chapters are out.
Then there is http://www.fanfiction.net/s/5273991/1/An_Accidental_Affair
In this one Ron reads a spell aloud from a book he stole while talking with Hermione. In the end the spell hits Harry who doesn't know what is going on
Of course this one is really good too. http://www.fanfiction.net/s/5862232/1/A_Life_Worth_Living
In this one Harry is 'adopted' by Logan and they travel together. Uhm it is better you read it. It#s so hard to write about it.
and this one. But that hasn't been update in a long time.. http://www.fanfiction.net/s/3438650/1/Not_Alone_Anymore
This one is about Harry being part Vamp and part light Elf. Harry had been searching for his mate but slept for a ling time...
I hope I could help you with those...
If you still want one of YYH. I have one it is called the fox who lived. http://www.fanfiction.net/s/5678603/1/The_Fox_Who_Lived