IV Seed Search Setup
To search for specific IVs when capturing a wild Pokemon or receiving a gift, open the Standard Seed Searcher.
For your first abuse it's best not to worry about shininess, so leave the 'Shiny Only' box unchecked. The search results may still show information about shiny frames and natures, but they will also include IV sets which meet your criteria but have no shiny frame associated with them.
First, choose a date range to search as well as the number of buttons you are willing / able to hold down when starting your DS. These choices directly affect the number of seeds that will be searched, with two and three held buttons increasing the number of possible seeds you can hit by over 500 times. Of course, this means that the searches will require more time to complete, however matching search results are displayed as soon as they are found so you will not have to wait for the entire search to complete before examining and using the results.
Generally, you will want to limit your search to IV frame 1 to save yourself a lot of annoyance. This is because the main way to advance the IV frame is by walking 128 steps with specific numbers of Pokemon in your party, which is tedious and usually unnecessary. However if you want your RNG abuse target to have a specific capture date or are looking for rarer spreads (for example, hex-flawless) you might consider leaving the maximum IV frame at 6.
PPRNG has a cache of all seeds which will produce 'useful' IV spreads within the first 6 IV frames, which makes these kinds of searches run significantly faster. Therefore, unless you have a specific reason to search for non-standard IVs or on higher IV frames, be sure to choose one of the pre-defined IV patterns from the drop down menu and keep your minimum and maximum IV frames between 1 and 6 to take advantage of the faster searching.
IV Seed Searching
The following screenshot shows the results of a search for an HP Ice flawless spread during the month of August 2011, allowing up the 2 held buttons. Standing legendaries such as the Musketeer Trio or Kyurem make for excellent first RNG abuse targets, and the highlighted result would work quite well on a mixed attacker set for Virizion.
Note that every DS will produce different seeds, so you will not be able to use the seeds shown below on your own DS.
To hit this seed, you would need to set the date on your DS to August 1st, 2011, and the time to 14:52:00 (2:52:00 PM). You would need to start the game from the DS menu 1 second before the target time, which in this case means starting at 14:52:59. (Note that for a DSi you may need to start up to 3 seconds before the target time, while on a 3DS the different is approximately 7 seconds. You will need to use whatever time difference you found when doing you initial DS parameter searches.)
As soon as you start the game from the DS menu, you would need to hold the D-Pad in the down-right direction while also holding the Select button (the combination listed in the buttons column) until the white screen with The Pokemon Company and Nintendo logos on it appears.
Hitting the Seed and Collecting your Pokemon
At this point, you can follow along with Smogon's onsite RNG abuse guide
to hit your seed, starting from the section titled Preparations in Game to Hit Your Seed
. If everything is done correctly and you have a bit of luck with your DS's Timer0 behavior, you will catch your Pokemon with the IVs you found in the Standard Seed Searcher. Unfortunately, the nature of the Pokemon may not be what you wanted, but to deal with that you'll need to understand how to manipulate the PIDRNG, so don't save your game yet.