after obtaining the sea chart 2 before you set sail you can talk to a guy on the dock in a green in a green shirt he will ask you if you have a cannon answer no (of course) and he will tell you a man named Eddo on Cannon Island is making a cannon you can buy Cannon Island is the smallest Island in the first sea chart
when on Cannon Island go talk to Fuzo, the red head who is Eddo's assistant, he will tell you that Eddo has locked himself in his work station, but he says there is a back door and he says he will help you get to it so he opens the wooden gate the all you have to do is get past the bomb garden and the cavern and you can get into the work station through the back door and he will sell you the cannon for 50 rupees
Buy a cannon on cannon island and blow the rocks up!!!!
You can't, sorry
there 4 i think
first your arxeidia
in the courage temple on molida island
You get it in the temple of wisdom.
the bow is on molida island in the courage temple
the island of ruin
take it to the sun door on molida island
You can find it on ebay for cheap around $17
you must lower the water
It is in the North-East Corner of the South East sea. When you reach it, you have to blast away the ice with your cannon before you can enter the island. Hope this Helps!! :D