Go to lakebed temple at the bottom of lakehiyla(get zorra armor first before you do this)then go to the third dungeon room then go to the bottom and get your fishing rod and fish but the fish is forbidden so there's no point of catching it
Google "Zelda twilight princess game cube walkthrough"
Twilight Princess
its compass for your information... and you find the compass in a chest in Twilight princess
find the cannon and get shot out of it.
use the walkthroughs
Find the big key.
There is one in each dungeon.
to the bridge of eldin
somewhere
in the goron mines
In the first dungeon.. If you have a compass, you can find them easily
give it back to ilia in kroke villge