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Can anyone confirm if these points about the DPPt Poké Radar are correct? There is a surprising amount of false info regarding this thing.
>the Radar tries to generate 4 rustling patches of grass in 4 squares of tiles around your character
>these patches can be rustling either quietly, violently or be shiny. Special encounters (Poké Radar-only, Trophy Garden, swarm,(?) dual-slot, etc.) can only be encountered in violently rustling grass
>these patches have 28%, 48%, 68% and 88% chance to continue your chain respectively (closest to furthest)
>having caught the previous encounter adds a 10% bonus to this chance, but ONLY if you do not reroll the next rustling patches of grass
>taking a patch on an edge or corner tile adds a separate chance for your chain to break due to the Radar trying to generate all 4 rustling grass patches on non-grass tiles
>going from an encounter on a violent patch to a quiet patch (or vice versa) has a high chance of breaking your chain (100% if it's a special encounter)
>if a given patch is set to break your chain, it has a 50% chance of changing rustling type (which means a fail chance on the 4th row is more like 6% or 1% with the catch bonus if you avoid opposite types)
>after chain 40, your shiny patch chance is maxed out and you can just avoid any more regular encounters and keep rerolling for shiny patches
>a shiny patch will always try to continue your chain, and it can only fail due to edge/corner tiles
So...
>always stick to the same rustling grass type after the first encounter
>always take the 4th row after the first encounter, no exceptions. If it's not there or opposite type, reroll
>taking a rustling edge tile might be preferable to rerolling if it means keeping the 10% bonus. If you don't have the bonus or the tile is particularly bad, these should be rerolled
>if you're extremely patient, avoiding shiny patches on edge/corner tiles means you can just keep rerolling until your repels run out and fill boxes with shinies