Garo's Mask

The Garo's Mask is given to Link by the Gorman Brothers in Majora's Mask. It resembles the head of a Garo Ninja. Wearing it allows entry into Ikana Canyon, as well as the ability to encounter and battle against Garo Ninjas. If defeated, the Garo Ninja will reward Link with a tip that may help him on his quest.

If ReDead see the mask, they will dance, allowing Link to walk past them without any trouble.

Obtaining the Mask
The procedure is simple, but sometimes difficult to execute. You must go to the Gorman Brothers' race track once you have Epona, and ask to race against them. If you win, they will award you with the Garo's Mask.