pokemon-x-y – How Much Does the Masuda Method Increase the Chance of Breeding a Shiny in Pokemon X & Y

Items

• Destiny Knot (Hold). Will guarantee that the parents pass on 5 IVs to the child.
  • The IVs are chosen individually from either parent, i.e. it doesn't matter which parent holds this.
  • The IVs chosen are randomed from each parent, i.e. One time you might get 4 from the father, 1 from the mother, another time you'll get 3 from the mother, two from the father and so on.
  • The IV not chosen will be generated normally, thus it is possible to generate a full IV in this case as well)
• Everstone (Hold) - Will guarantee that the child has the same Nature as the parent that holds it.
• Power items (Hold) - Will guarantee the specific stat IV from the holding parent is passed on.
  • Items can be bought with Battle Points (BP) from the Battle Maison. They cost 16BP each
  • When used in conjunction with Destiny Knot, the Power item's affected stat is counted against the 5 copied by destiny knot.
  • The items include:
    1. Power Weight (HP)
    2. Power Bracer (Atk)
    3. Power Belt (Def)
    4. Power Lens (SpA)
    5. Power Band (SpD)
    6. Power Anklet (Spe)
• Oval Charm (Key Item) - Increases the chances of Pokemon in daycare producing an Egg.
  • Awarded from Professor Sycamore upon completion of the Kalos Pokedex
• Shiny Charm (Key Item) - Increases the chance of breeding a shiny Pokemon off the two parents are from different language (known as the Masuda method). It also increases the chance of shiny encounter in the wild. It is awarded after getting (not only seeing) all Pokemon from the national dex (minus event only Pokemon) from the professor.

Other

• Flame Body (Ability) - Halves the amount of steps needed to hatch eggs.
  • Talonflame works well for this, as it also doubles as a flier, meaning you can leave 5 empty party slots for eggs.
• Hatching O-Power (O-power) - Cuts the amount of steps needed to hatch eggs.
  • Awarded upon collection of all the other O-Powers, as well with high style-rating (around $50k-$10k for mega stones)
  • Find Mr Bonding in Café Introversion (South Boulevard, Lumiose City)

That's just tough luck you had there =P

But yes, that can happen. I've been breeding Togetic with Hustle and they've given me some Serene Grace Togepi all right.

There's a 'workaround' with the Ability Capsule which lets you change the ability of your Pokemon to another ability it can have (except if that other ability is a Hidden Ability), that is, if you have enough Battle Points (BP) to pay for one at the Battle Maison.