I have a scizor with defog and a ditto .
I want another scizor with move defog . If I breeded them together would the egg will have scizor with move defog.
I don't care about ivs
Defog is an egg move on Scyther, so as long as the parent Scizor already knows defog then it will inherit it. Note that Scizor must have defog in one of its moveslots otherwise it won't be passed down
Source: Experience and https://pokemondb.net/pokedex/scyther/moves/6