and how often do I encounter Pokemon
Hidden Grottos List
Pinwheel Forest, the second one on that list (there are two grottos in Pinwheel). The chances of finding a Pokemon in any grotto is 20%, and the chance of finding a Poliwhirl in that grotto is 1%.
Pinwheel Forest. In the outer area.
http://bulbapedia.bulbagarden.net/wiki/Pinwheel_Forest#Outer_area_3
How to change your username How to add a user avatar Why was my post hidden? Question etiquette Flags vs Downvotes Anime FAQ Official PokemonDb League
Type a Pokemon name, type, move or ability to see instant results.