In Ocarina of Time, the Keaton Mask is the first mask Link obtains in the Happy Mask Shop sidequest. It can be sold to the guard standing outside of the gate to Death Mountain in Kakariko Village for 15 Rupees, however, Link only needs to repay the Happy Mask Salesman 10 Ruppees.

In Majora's Mask, the mask can be used to summon a Keaton. Link must stand in any ring of moving bushes, cut one of the bushes down, then stand there until a Keaton appears. He will ask Link three questions.[1] If he gets them all correct, he will be awarded with a Piece of Heart.[2] The Keaton Mask Link receives in Majora's Mask was given to Kafei when he was little by the Man from the Curiosity Shop.[3]

Obtaining the Mask
Kafei wears the mask to keep his identity hidden from Termina. The Keaton Mask is obtained by going to Curiosity Shop Guy in Kafei's place, after delivering the Letter to Kafei. It is well hidden, requiring Link to go to Kafei's hideout at 1:00 in the afternoon on the Final Day. For more information, see the Reuniting Kafei and Anju article.

The Wind Waker
In The Wind Waker, the Keaton's Mask appears in a cameo among Carlov's sculptures in the Nintendo Gallery. It can be seen with along with the Bunny Hood, Goron Mask, and the All-Night Mask behind the counter hanging on the wall.

Trivia
The Keaton Mask shows resemblance to the face of Con from the Kirby series.

1.↑ "Answer me this... Pick one of the three choices..." —Keaton (Majora's Mask)
2.↑ "Hee-hee-ho! Good! Very good! Take this prize!" —Keaton (Majora's Mask)
3.↑ "All it took was one glance at that Keaton Mask he was carrying for me to realize that I was looking at my old friend. I gave him that mask a long time ago when he was just li'l Kafei. Didn't know he kept it that well for so long..." —Man from Curiosity Shop (Majora's Mask)

Add A Favorite Mask To Your Inventory Box (Role Playing In A Way) ^_^

WHAT IS BOX ?
Click MODULES on top of your channel
Then click
OTHER CHANNELS (this is called BOX)
Click EDIT at other channels BOX
Type there Keat0nmask