Okay, first what you're going to need to do is download the RNG Reporter, you can find this by going to Smogon, or just Google it whatever.
BEFORE STARTING:
Have 5 Pokemon in your party, not 4, not 6, not any other weird number, just 5, and make sure the parents you are going to breed are with you.
Be on the PokeTech Application BEFORE Happinsess Checker!!!!
Step 1: Open up RNG Reporter, and go to DPPt Seed Finder
Step 2: Select the Middle Tab, this should give you options to set stats, nature, etc for a Pokemon, along with your Time and Date, time being down to the minute.
Step 3: Go to a area where you can catch a Pokemon of level 50 or higher, save your game there, and Soft Reset (L+R+START+SELECT)
Step 4: Press A rapidly and enter the Game as quickly as possible, keeping record of the minute you enter your game, MAKE SURE YOUR GAME/DS IS SYNCRONIZED WITH ANOTHER TIME! Then enter the minute into the Minute Box in the RNG Reporter.
Step 5: Go catch a Pokemon, remaining in the grass you saved in. Once you have caught a Pokemon of level 50 or higher, enter all of it's information into the RNG Reporter. Once you've entered all of the information, press Find.
Step 6: Now you will see, hopefully just ONE line of information, highlight that (just click it) then click Ok. Now you have your seed.
Step 7: Now in the Seed Hexidermal you'll have your seed code... DON'T TAMPER WITH THIS! Now, if you're using regular parents you will click on the area that says "Method 1" Scroll down and click DPPT Egg PID Normal, and if you're using different region Pokemon, you'll use DPPT Egg PID International.
Step 8:Now, Check the Shiny Box, and click Generate.
Step 9: Now, you should have a whole list of different natures of Pokemon, go ahead and right click on the first one, and click "Show PokeTech Taps".
Step 10: NOW, you should have how many taps you need. I.E. - 93 Happiness Taps and 4 Coin Flips
This means you have to tap each App that many times, and the Happiness Application requires double tabs, meaning the Pokemon have to JUMP in order for it to count.
Step 11: Now that you have done your taps, put your Pokemon into the Day-Care, and run around until you get your egg.
Step 12: If you want to SOFT RESET FOR IV'S, save before receiving your egg, BEFORE TALKING TO THE DAY CARE MAN!!!
Step 13: Go ahead and take the egg, hatch it, and if you did the steps correctly, you should have a Shiny, if you plan on Soft Resetting for IV's, don't save, and don't worry, Soft Resetting won't affect the fact that it's Shiny.