Unloack Great Fairy
Great Fairy (Link) - Unlocked by completing the mission in the bottom left corner on the adventure map after searching it.
Magic Rod (Link) - Chest from a keep in Eldin Caves.
Spear (Lana) - Chest from a Keep in Valley of Seers.
Unlock Characters
Darunia - Beat Death Mountain.
Fi - Beat Skyloft.
Ganondorf - Beat Valley of Seers.
Impa - Clear Hyrule Field.
Lana - Clear Faron Woods.
Midna - Beat Twilight Field.
Sheik - Clear Eldin Caves.
Zelda - Beat Lake Hylia, Palace of Twilight, and Sealed Grounds.
Medals
There are 25 unlockable medals that serve as achievements in this game. They can be viewed in the Gallery.
01 Destructive Force - Defeated 1,000 or more enemies in one battle.
02 ??????????? - Defeated 100 or more enemies with one Special Attack.
03 Magical Warrior - Defeated 500 or more enemies with one Focus Spirit use.
04 Hyrule Warrior - Defeated a total of 100,000 or more enemies.
05 Millionaire - Acquired a total of 1,000,000 or more Rupees.
06 ??????????? - Acquired a total of 1,000 or more weapons.
07 ??????????? - Acquired a total of 100 or more super-rare materials.
08 Lawn Mower - Cut a total of 1,000 or more clumps of grass.
09 ??????????? - Saved an ally 500 or more times. (Enter a green circle surrounding an 'in danger' ally.
10 Marathon Man - Dashed a total of 42.195 km or more. (Only running counts towards this).
11 Hero in the Green Tunic - Complete legend mode.
12 ??? - ???????????
13 Serious Adventurer - Attained "A" Rank in Adventure Mode (One A rank counts).
14 ??????????? - ???????????
15 ??????????? - ???????????
16 ??????????? - Found all secret elements in Adventure Mode.
17 Bug Catcher - Defeated 50 Gold Skulltulas.
18 ??????????? - Completed five illustrations.
19 Big Bro - Helped 10 Network Links in Adventure Mode.
20 ??????????? - Created every kind of badge.
21 ??????????? - Created every kind of mixture.
22 Craftsman - Completed a battle using only items. (bombs/bow/boomerang/hookshot).
23 ??????????? - ???????????
24 Cucco's Revenge - Managed to get defeated by a Cucco.
25 Superstar - Activated all Focus Spirit bonuses. (Have 130 KOs [100 with DLC characters] in one Focus Spirit before the bar is emptied/activated).