This thread is for discussion of the best locations to use the Poké Radar, questions about the Poké Radar, and your own experiences while using the Poké Radar.
I'm not going to put a guide in this post yet, mainly because I am not completely sure how the radar works in this generation.
I'll try to put together a list of good places to use the radar, and what Pokemon you can find in each location.
I'll start off talking about one of the harder Pokemon to chain with the radar: Eevee.
This is a map I created of Upper Route 10, which includes all the grass locations. Green is grass, White is plain land, and Black is impassable land/obstacles. The light shades of grey are just noise that was created by MSPaint when I was resizing this to a visible size. (originally 25x70)
As you can see, this route is absolutely littered with obstacles, making it quite difficult to maintain a chain. To make it worse, many of the obstacles are really high and obscure your view of the grass. This version of the map shows in light green the patches of grass that can be blocked from view depending on where you stand. The largest square-ish patches on the route turn out to have some big problems with visibility.
I personally use the upper-right patch of grass. It's quite wide, but unfortunately the shape isn't optimal. If anyone else has better luck with a different place on this route, I'd love to hear it.
The method that I use to more easily find Eevee is to start in the yellow flowers where eevee is more common, then move to the bottom right grass patch and use the radar again, then slowly move up to my usual patch. This is not necessarily faster than just staying in the grass and hoping for good luck, but it's a bit more consistent.
Something I've noticed is that sometimes the pokeradar music changes to become more upbeat. I have no idea what it means, but I'm guessing that it means that a Shiny pokemon has been detected. If so, then I've had quite a bit of misfortune - the first time I had this happen I didn't see any good patches of grass so I reset the radar, and the music turned back to the normal pokeradar music. The second time I had this happen, I thought there might be a shiny patch located out of sight behind a rock, but when I tried going there, it turned out to be something else and my chain broke.
I'm not going to put a guide in this post yet, mainly because I am not completely sure how the radar works in this generation.
I'll try to put together a list of good places to use the radar, and what Pokemon you can find in each location.
I'll start off talking about one of the harder Pokemon to chain with the radar: Eevee.
This is a map I created of Upper Route 10, which includes all the grass locations. Green is grass, White is plain land, and Black is impassable land/obstacles. The light shades of grey are just noise that was created by MSPaint when I was resizing this to a visible size. (originally 25x70)

I personally use the upper-right patch of grass. It's quite wide, but unfortunately the shape isn't optimal. If anyone else has better luck with a different place on this route, I'd love to hear it.
The method that I use to more easily find Eevee is to start in the yellow flowers where eevee is more common, then move to the bottom right grass patch and use the radar again, then slowly move up to my usual patch. This is not necessarily faster than just staying in the grass and hoping for good luck, but it's a bit more consistent.
Something I've noticed is that sometimes the pokeradar music changes to become more upbeat. I have no idea what it means, but I'm guessing that it means that a Shiny pokemon has been detected. If so, then I've had quite a bit of misfortune - the first time I had this happen I didn't see any good patches of grass so I reset the radar, and the music turned back to the normal pokeradar music. The second time I had this happen, I thought there might be a shiny patch located out of sight behind a rock, but when I tried going there, it turned out to be something else and my chain broke.
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