Off to Be the Wizard question

Do you think that Martin changes enough as a character to be considered dynamic? I think that he changes from being a one sided character being more responsible. And because this contrasts to the responsible Philip, and this causes them to be foils (characters whose differences cause each other to stand out). Even though Martin changes in the book causing him to be dynamic, I feel that isn't very round as a usual main character is. Overall I feel that Martin was Dynamic but Flat, as apposed to many main characters. Do you feel that maybe he was round or static?