So my sister has been trying to breed a shiny Charmander using the Masuda Method on her White 2. She got a baby Charmander with the egg moves Dragon Dance and Dragon Rush. Once she began breeding that one, after a few eggs, both of the moves disappeared from the offspring of that Charmander and a Japanese Ditto.
What should she do to fix this? Should one of the babies be raised to level 100 so they can't forget the moves in the daycare?