I have a japenese ditto and I was planning on leveling up my male noibat to lvl 100 so it can get it’s egg moves will this affect my chances of getting a shiny noibat?
The level of the Pokemon does not matter if you are breeding.
You can still breed the Pokemon yet if you want to change it's EV's you can't. It will not affect you're chance of getting a shiny Pokemon yet the ditto will because of the Madusa Method.