there isn't a hookshot, but there is a grappling hook in the ice temple that you have to get to get through the dungeon.
The slingshot is not a weapon in Phantom Hourglass.
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You can find it on ebay for cheap around $17
You can't, sorry
first your arxeidia
Isle of Gust (in the temple)
there 4 i think
use the grappling hook to make sort of a slingshot and then turn around and get out the bow and arrow and shoot the slingshot and then the arrow will bounce back and will hit an eye if you aim carefully and do the same thing to hit the other one it will take some time though
You get it in the temple of wisdom.
Yes, it does not vanish.
in the courage temple on molida island
they are the warping phantoms if they another phantom or a phantom eye sees you they will warp by you
the last pure metal in Zelda is at mutohs temple it is givin to you after you beat the boss "EOX".