First off:
These are not my invention. All credits go to Nintendo.
Second off (For Newbies):
These are not strictly item sprites. If you make the graphics for them, you can actually use some or all of those as the slash sprites. I have provided an example of how the weapons should be aligned there points should go like this:
1st: upper right. 2nd: lower left. 3rd: Upper Left. 4th: Upper right.
Third off:
They have kind of a wacky pallete, so you might need to recolor AND change csets while recoloring.
Happy Questing!

Finally, See this:
http://www.youtube.com/watch?v=SFNeDShnM20