To do the Masuada Method you need two parent Pokémon from different countries, which you have. That's about it. Still note that, while the MM increases the chance of hatching a Shiny drastically, it's still a very small chance.
The Oval and Shiny Charms are helpful, but not necessary, and are quite difficult to get besides. With the Shiny Charm the chance of hatching a Shiny rises to 1/512, or approx. 0.002%.