Okay, go back to the corner where you first saw The G's, in Floroma, and walk into the trees. Then you have to battle them to earn the key and the honey. Go back, but if your pokemon are low on energy, go to the pokemon center first; you will be battling Mars, one of the commanders in The G's. She has two pokemon, but they are 12-16 level ones. It entirely depends on those two battles, so, good luck.
