There are 13 Chests to Unlock.
From start go right and up over bridge for 6 Chests. (Use Rain Cloud on 3 flowers in chests)
Head down next 2 bridges for 5 Chests. (Use Rain Cloud on 2 Flowers in chests)
From this island head up to the left for 1 Chest (You will need to crack red & blue eggs and get dragons to fight. To Unlock boom gate (To the right of fire breathing rocks use fire on dynamite, use key on Power Box)
Head down and right. Crack egg and lead blue dragon to red dragon, Use key on Power Box.
Go down bridge then right and up bridge. Go through boom gate and use key on last Chest