teh_spamerer
Smash Master
That's not foolproof, Link can jump right after grabbing the ledge instead of waiting to fall into hanging position.Link hookshots the top of the ledge so that when he is hanging, he will sweetspot the edge. Before he actually falls to hanging position, fox grabs the ledge. Than Fox just sits there waiting until Link hits A. Link doesn't grab the ledge because Fox is hanging on it, and than Fox simply hits down b as soon as he sees Link popping up.