Once in the pause screen, tap the Wolf Link Amiibo to the Wii U gamepad, and you will be prompted with the choice to enter the dungeon. The Cave of Shadows is accessible at any time (other than key story points), and accessed via the pause screen.
New to Twilight Princess HD, the Colossal Wallet is a reward given to players after they clear the new Cave of Shadows dungeon exclusive to players with the Wolf Link amiibo. Return to Agitha after finding all 24 of the Golden Bugs scattered throughout Hyrule, and Link will be rewarded with the Giant’s Wallet, which allows Link to carry 1,000 Rupees. Good luck on finding all those Golden Bugs
