This game is also available on PC.
Doll of Thunder - Buy in Bowerstone North or Arena during the Arena quest
Doll of Briar Rose - get a high score in the card game at Bowerstone South
Doll of Whisper - Get a high score in the coin game in Oakvale
Doll of Maze - Get a perfect score in the game at Hook Coast
Doll of Twinbalde - Get a high score in "Spot the Addition" in the pub at Twinblade's camp
After you get all the dolls you can talk to the teacher in Bowerstone South and the quest will be finished
To get past the Demon Door in Greatwood Gorge eat about 10 evil crunchy chick foods in front of it. You can buy these from Darkwood or the Bandit Camp. Another way is to kill loads of people infront of him, but you'll get loads of bad points for this.