Instructions
Take the egg from the Pokemon breeder and place it on your Pokemon team.
Press any direction on the directional-pad to make your character take a step.
Walk or ride your bike around to build up "steps" until the egg hatches. The exact number of steps it takes to hatch an egg varies depending on which Pokemon you are trying to hatch. According to Serebii.net, the number of steps can be as few as 1,000 or as many as 10,000.