Shinx Eggs hatch in 20 Egg cycles.
Generation IV 5355 steps
Generation V/VI 5140 steps
Generation VII 5120 steps
Generation VIII/IX 2560 steps
List of Pokémon by breeding attributes (Bulbapedia) Decreasing Egg cycles (Bulbapedia)
It takes 5120 steps to hatch a shinx egg. Use a pokemon with flame body to make it hatch faster. Hope this helps! http://www.serebii.net/pokedex-dp/403.shtml
