i have eggs for spiritombs so dont tell me they do not exist.
Spiritomb Eggs hatch in 30 Egg cycles.
Generation IV 7905 steps
Generation V/VI 7710 steps
Generation VII 7680 steps
Generation VIII/IX 3840 steps
List of Pokémon by breeding attributes (Bulbapedia) Decreasing Egg cycles (Bulbapedia)
It takes 7,680 steps.
To anyone who wants to know how many steps a pokemon requires, go on serebii, and on the pokemon's pokedex entry, look at "Base Egg steps." That will tell you how many steps are needed.