Select your Version and DS Type from the dropdown menus (in the red rectangle). Paste in your MAC address (the dashes will disappear; pretend the one in the screenshot fills the whole field). Pick any date and time (in the black rectangle), but put 30 in seconds for simplicity.
Now that RNGReporter is prepped, have Chatot and your Sweet Scenter in your party, and go to a place where you can find high-levelled wild Pokemon with no wandering NPCs. The last cave of Victory Road (with Cheren) is recommended as it’s close to a Pokemon Center. Save your game, and
hard reset (Get out of the game; DS Phat/Lite users turn their system off, DSi users press their power button, 3DS users go back to the home menu).
Now, set the date and time you picked earlier as your DS’s date and time but DO NOT confirm the time yet! That would start the seconds count, which would disrupt the process.
Next, open up EonTimer. This is a helpful tool for timing the boots of your games. You could just use the DS Phat/Lite’s analog clock, or you could sync your DS’s time to an external clock. But EonTimer will do that in a neat interface, with adjustments that might have to be made later. Coming from someone who used to use their DS Lite clock, I recommend EonTimer.
Put 30 in the Target Seconds field, or whatever you set your seconds to in RNGReporter. Make sure Standard mode is selected, though it should be already.
Now comes the trickiest part of the whole process. At the same time, click Start on EonTimer, and confirm the time on your DS (DS Phat/Lite users press A, everyone else taps something). This will start EonTimer’s countdown, and your DS’s clock at the time you set. Now, go back to your system’s menu, and get ready to start your game. As soon as the countdown finishes, boot your game.
Since we’re doing Standard abuse, this is the most timely thing you’ll have to do in the whole process, and this is only down the second. Mind you, you’ll have to do this each time you RNG, but still. This is it.
Take care not hold any buttons while the game is booting. Once the Game Freak shooting star thing shows up, you’re good, and you can start the game like usual. But make sure you don’t start the C-Gear! The entirety of Standard abuse depends on it.