(Not counting the ones from the daycare because I already know how the daycare works)
For example, I want the egg from Rilley in Pokémon platinum to hatch an modest Riolu, if I take a modest pokémon with the ability syncronize leading the party when I receive the egg, it will have a chance of affect the pokémon hatching from the egg?
Also, if is no problem, can you people also provide information regarding the other games in which a similar situation may occur? I plan on do the same thing on the other games if is possible, thanks all!