3000-5000 steps about im not 100% percent sure
i don't have Pokemon emerald, but the answer is always the same. not how long. how many steps. walk ALOT and the egg will slowly start to hatch
the steps to hatch an egg depends on what Pokemon you have in the egg. it normally takes more steps for rarer Pokemon in the eggs. Good luck hatching eggs!!!!! ;)
It takes AT LEAST 9180 steps to hatch an Eevee.
5355 steps.
usually i did it and it hatched at 4054 steps