I am breeding a modest porygon with a modest ditto and a naive porygon. But I bred upto 50 porygon, got a docile shiny. But still no modest porygon. Please help me!( In fire red)
This is probably because you haven't put an Everstone to the Modest Ditto you're currently using to breed with your Porygon.
Everstone passes the holder's nature to the child.