How do you get the dongero's mask in majora's mask?

Answer 1

First, go to the Goron Shrine. Then use a Deku Stick to carry fire from the torches to light them all. You'll need the Bunny Hood to light them all. Then, the chandelar will start rotating. Ram into them by rolling as a Goron. If a strange rock comes out, then pick it up and carry it to the Goron in the Mountain Village. Then throw it onto the ledge, and he'll give you the Don Gero's Mask.

Answer 2

You never get a mask from Mayor Dotour. You get a mask from his wife, though, in the room next to his.