Ok, so since rigging is currently done in BrawlBox with my tutorial, and the rigging is difficult to do in BrawlBox(In my opinion), I'm going to say that you should first start seeing if you can import a regular object. So try to import Dedede's hammer(I have a .fbx that can be imported to Blender in the link below) onto Link, and then delete his sword, so that he looks like this(And yes, you'll have to do some rotations and translations for it to be at the proper location):
http://forums.kc-mm.com/Gallery/BrawlView.php?Number=209890Included .fbx of Dedede's Hammer and Hammer Texture(Note: You have to delete Dedede after importing the .fbx to Blender, since you're only importing the hammer and not all of King Dedede):
http://www.mediafire.com/download/039rxlnsh9wlvp9/Dedede%27sHammer.zip