Once you get the stick as a weapon, simply head over to the boy making the challenge to run to the Demon Gate and back in 50 seconds. Stand beside him and hit him with the stick. The impact will push the boy over a little each time. Do this until you get lectured by Maze. Then, repeat the process. This cuts off a lot of distance from the run, making it easy to win this challenge. As an added bonus, if you want to be an evil character, you also get evil points for doing this.