Where is the legendary treasure in chapter 1 shattered island?

When you get past the chompies, you will come to a cannon that you must fire to knock down a wall so that you can get TO the key that unlocks the gate imprisoning the townsfolk. You must fire the cannon to knock down the wall to go further. After you fire the cannon once, wait a second or two for the fire option to return and FIRE THE CANNON A SECOND TIME. The second shot takes out a building a little further along the route. It is near the second cannon. The scroll is just beyond the second cannon. If you fire the first cannon twice, the building holding the Legendary Treasure the "Enigma Pig". Will disappear and you can FIND the treasure. Does this give you any hints about future cannon use? When you find a cannon, don't hesitate to fire them multiple times. SAME with bombs. BOMBS are incredibly useful for knocking down a wall. AND they can be incredibly useful when thrown down onto various enemies to quickly dispatch groups or even single enemies much quicker than your skylander can do otherwise. Bombs will not hurt you (other than your skylander saying OUCH. If a bomb is handy grab it. Just might come in handy further on. Most bombs have a 10 second fuse. You can typically go back and get another. WHen doing Heroic Challenges, bombs are absolutely essential. Without them you can't complete the Challenge.