What you need to know:
1. Have hundreds of Max Repels to avoid non-PokeRadar encounters.
2. Get Poketch APP 20 at Pal Park to keep track of your chain.
3. Having a Pokemon with Static/Magnet Pull in front of your party makes it easier to chain Electric/Steel Pokemon.
4. There are three types of patches, these are normal, sparkly, and shiny.
5. Patches on the edge of the grass patch have a high chance of breaking your chain.
6. The highest rate to find a shiny patch is 1/200. The rate continuously increases from 1/8192 at the beginning to 1/200 at 40. At 40, the rate stops increasing.
7. NEVER walk directly behind you.
Here is a number chart showing the possible PokeRadar patches, you are 0:
4 4 4 4 4 4 4 4 4
4 3 3 3 3 3 3 3 4
4 3 2 2 2 2 2 3 4
4 3 2 1 1 1 2 3 4
4 3 2 1 0 1 2 3 4
4 3 2 1 1 1 2 3 4
4 3 2 2 2 2 2 3 4
4 3 3 3 3 3 3 3 4
4 4 4 4 4 4 4 4 4
8. There is a PokeRadar patch in every one of those number lanes.
9. Patches that appear in the 4th lane are the safest. Only go into them.
10. Reset your radar after a battle by walking fifty steps.
11. Turning your DS off, leaving the route, and getting on a bike all break your chain.
12. Do NOT go into any patch if you cannot see any (excluding the one behind you if there is one). Just reset again.
13. Do NOT go into any patch that is touching another patch (this includes diagnol touching)
14. Do NOT go into any patch that is parallel to another patch.
15. Do NOT go into any patch that is in the corners of the number grid, even if it is a 4 patch.
16. Only go into patches that match your starting patch. So if the first patch was a common one, only go into them. Do not start off with a common one, and go into a sparkly one.
PokeRadar Tutorial
Shiny Patch
Person chaining, showing you everything he does:
Part 1
Part 2
Part 3
Part 4
:3