No, okay.
My suggestion, for the shiny egg part, always find a frame that's odd. For instance... 7+. So 7,9,11,13,15. Are all good low frames that are odd. So what you want to do is call Joey half of the amount of times -1.
So say you want frame 7, do the -1, leaves 6 divide by 2 = 3.
Call joey 3 times, exit the PokeGear as fast you can drop off the parents, do the whole run till egg, save, and stuff. It should be shiny after that.