Arrow Upgrade I -- A-3: Western Fairy Island
Use the Skull Hammer to pound in the peg
Arrow Upgrade II -- G-4: Thorned Fairy Island
Use the Skull Hammer to pound in the three pegs
Arrow Upgrade III -- B-2: Mother & Child Isles
Warp to this island to receive the Fire & Ice Arrows from the Fairy Queen
Bomb Upgrade I -- E-3: Eastern Fairy Island
Bomb the woooden gate blocking the entryway
Bomb Upgrade II -- D-6: Southern Fairy Island
Bomb the woooden gate blocking the entryway
Magic Meter Upgrade -- D-7: Two-Eye Reef
Destroy the Big Octo found in this quadrant to free the Great Fairy found here and double your Magic Meter
Wallet Upgrade I -- C-1: Northern Fairy Island
Bomb the large boulder in front of the entryway
Wallet Upgrade II -- B-7: Outset Island
Bomb the large boulder in the Forest of Fairies