Hey, this a question about 2 games. Will your answer get ten points?

On Shadow the Hedgehog, What does the Shadow Rifle do? I'm trying to unlock it and I wanted details on what kind of weapon it is; A lock on weopon, Bazooka, what? I know HOW to get it but not what it does. On Zelda Twilight Princess, I discovered a secret cave in Lake Hylia near the tower covered in vines and the howling stone (It's a little in between) by blowing up the bolder(s) with bombs. The Secret cave is dark and spooky with ALLOT of areas in there, I'll find small areas with allot of bolders and a torch I can light with my lantern and each of the bolders covers up a path. I must blow 'em up and go down the path I choose. What's at the end of this cave and what path do I take if you know. Hope you help. BYE!!!