Okay, here's one to add to the list.
Refreshshipping (Psyduck & Marill) (Note: If I got the second name wrong, please correct. I'm having a hard time spelling it right.) -_-
If anyone wants to know how this works, feel free to ask. Understand though that the explanation is quite long, but highly logical. It contains no hints whatsoever, but makes the highest amount of sense in all its right. :)