You can't ledge hop with it, but you can make an attempt to. If you do it early enough, and can land the hit with Ganon, then you can still have time to up B back onto the ledge before they can even get back. Combined with the Infinite Edgehog, it's really a pain to get around.
There is, however, a way to double forward air with him. You stand on the side of a platform or ledge, jump back, and c-stick the forward air so that you can still direct yourself backwards, and then use your double jump to throw out another forward air. It's very risky, but once you get it down, the range allows for a safe return pretty much all the time. Plus, if you're doing it on the edge, you can jump back with the skull crusher off the ledge, and if your opponent starts coming to close too quickly, then you can choose to not throw the second one and go for the ledge, at which point you can consider using the first thing I mentioned.