The term Pokémon collectively refers to the fictional species that have made appearances, like normal animals can be grouped into different types. This series of caches covers a couple of the different type. p>
Grass is one of the three basic elemental types along with Fire and Water, which constitute the three starting types. .
Grass is one of the weakest types statistically, with 5 defensive weaknesses and 7 types that are resistant to Grass moves. Furthermore, many Grass types have Poison or Bug as their secondary type.
Note the clue in the lid to work out the mystery cache location of GC6PJV1 (might want to look this up before attempting to see what you might need to help solve).