A multiple step cache that includes finding 3 pokeballs to decode the final cache (tin).
Each pokeball has a number inside that you will need to work out the code to unlock the last cache.
The numbers are in no particular order. Like a wild pokemon in tall grass, you'll just have to encounter it.
The last cache has a padlock with a 3 PIN number you will need to decode using the 3 Pokeball numbers.
You will find the balls like any Pokemon trainer would, be using your instincts and eyes.
Lots of swag and 'Pokédex' Log book.
All the cache magic can be found in George Palmer Park.