Does the pokenav app that tell you when you’ve found all the Pokemon in an area

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Are there any special "hidden" Pokemon that the game will pass over unless you find them in a patch of grass? I don't know any examples but just curious. I'm huge on picking up Pokemon in each area and not leaving until I have all of them so this thing is amazing and I hope they keep it. So when I catch all Pokemon in an area it will say "all Pokemon caught" or something like that?

Edit: I literally just got the game and got to the part where there was a pokemon's tail shaking in the tall grass and you have to sneak up on it, do those show up in that app too?

Best Answer

Yes, the DexNav lists all of the Pokemon that you can catch in each area, including the shadows that you have to sneak up on, and any Pokemon that only show up in hordes.