This is a bit of a beginners guide for those, like me, who had a hard time understanding the garbled muk (lol pun) that people spewed when trying to explain to me how the Poke radar worked. I normally wouldn't even bother with this, but since the Radar has made a startling return in X and Y, I feel it's necessary to share my findings on how this works in the newer games. As there are some slight, but very important differences.
So, first off, what is a Poke Radar??
A poke radar is a device that can be used to find the same species Pokemon one after another in a row. This only works in grassy areas and cannot be used for caves, water, etc... When used, several patches of grass around the player will shake. Each of these patches will usually contain a different Pokemon. When you run into the shaking grass a battle will start. If you catch or faint the Pokemon in the battle the grass will shake again and if you run into the correct patch another of the same Pokemon you just fought