Masuda Method, only took 220 eggs! This was my first shiny hunt ever. Trying to decide who should be next, I'm thinking Noibat : r/PokemonSwordAndShield
Masuda method - Bulbapedia, the community-driven Pokémon encyclopedia
How To Breed Shiny Pokemon With The Masuda Method
How to catch Shiny Pokemon in Pokemon Brilliant Diamond & Shining Pearl - Dexerto