Instructions
Travel to the day care center on Island #4.
Speak to the woman inside the day care center. She will ask for two Pokemon to breed.
Select a female Scyther and any male bug Pokemon. The Scyther must be female, as the Pokemon that is bred from two Pokemon will be of the same type as the Mother.
Leave the day care center and walk a total of 256 steps around the game world. When this is complete, return to the day care center and speak to the woman inside to receive an egg.
Walk a total of 6,400 steps with the egg in your Pokemon lineup. When the amount of steps has been reached, the egg will automatically hatch into a Scyther. The Scyther hatched by the egg starts at Level 5.