I commend you for your act of selflessness, Mr. Neleh Jr. However, most, if not all, of this information is already in the cheats section for this game.

In the future, check out the cheats page and make sure your advice hasn't already been given by someone else. If it isn't, submit it there.

Typically, such help is only given on the forums when it's requested (e.g., what notes do i play at the pond?!).

As for your inquiries, you can knock the Mario doll down and avoid fighting Booster if you don't get caught during the curtain mini-game. What you saw in Rose Town was just Link (from the Legend of Zelda series) making a cameo appearance.