Pokemon Go is a reality app that is basically a hunting game. You hunt Pokeman. To advance in the game, you have to venture out and about into areas known and unknown. This is in the real world, not in a game world. It encourages people to get off the couch and get out in the fresh air and walk about to locate the Pokeman.
There are also Poke Stops that you need to locate which will enable you to advance further in the game. These are generally in a place of cultural significance, e.g. historical building, statue, park etc.
Then there are Poke Gyms which are bigger locations, e.g. bridges, airports etc.
So the big question is, where are the Poke Stops and Poke Gyms? This I cannot answer in full, but I can tell you there is a Poke Stop at Whiteman Park! I won't spoil your fun of finding it, but it is located in The Village.
So this weekend if you are wondering what you are going to do, pack a picnic (there is a licensed cafe if you don't want to take a picnic), chairs and football and head to Whiteman Park! You can even take the dog (they must remain on leads unless they are in the enclosed dog parks at Mussel Pool). Don't forget, entry to Whiteman Park is FREE and most of the museums are gold coin donation, so can work out to be a very cheap day!
If you are visiting from afar, don't forget Whiteman Park is smack bang in the middle of the Swan Valley, where there is a host of things to do. Make a weekend of it and enjoy the vineyards for mum and dad, Whiteman Park and the Margaret River Chocolate Factory for the kids!