Instructions
Turn east from the entrance to the volcano and continue down the path until you come to a fork in the road.
Turn west at the fork and continue forward along this path until you find your way blocked by an obstacle. Ignore the obstacle and swing north.
Continue north and turn west again as the path curves around, then, take the north path again when you have the option.
Smash through the obstacle blocking your path and continue north until you come to a four-way intersection.
Turn west and continue on until you hit another obstacle.
Smash through this obstacle as well and keep walking along the path. At the end of the path, you will find the treasure chest containing the feather.