You will need:

• 2x Absols with the ability “Super Luck”.
  
• 1x Ralts (or Porygon) with the ability “trace” to confirm the Shiny Pokemon’s Hidden Ability.

(Illuminate and O-Powers are optional.)

If you have one Absol that’s ok! However, your luck will not be doubled. Best to have two “Super Luck” Absols. You will start to notice the Shiny Pokemon you encounter have their hidden abilities.

• You can have the two Absols on your party in any order.
• Absols do not have to be shiny.

Discovered this Method after questioning my Luck.

“Is it possible that my luck is because of Absol’s ability Super Luck?” - See Post

Someone else replied with this: “I’ve noticed that too! In my platinum game I had an Absol with Super Luck and I ran into many shinies when I had her at the front of my party.. Two Magnitons, a Machoke, Girafarig and a Shinx! :) “

Then I Doubled it and Ta-Da! a Shiny Pokemon with its hidden ability appeared, then another one was encountered in a different Safari.

Super Luck not only increases the chances of critical captures, Shiny Pokemon, but it also lures in rare and hidden ability Shiny Pokemon.

It’s pretty much confirmed, well at least to myself.