Once Pikachu has entered the Flower Zone, Pikachu can speak to Mareep whom will inform that Rayquaza can be called upon if you have the mirror. The mirror is located on the top floor of the tree house in the Meeting Place. Upon returning it on the mirror's pedestal, Rayquaza will appear. Pikachu can now play Rayquaza's Balloon Panic. Upon beating the attraction, Pikachu will need to speak to Shaymin. Shaymin will ask for a watering can to allow the Gracidea Flower to bloom; the watering can can be obtained from Bellossom. Once the flower has bloomed, Shaymin will change to its Sky-Forme and guide you to Sky Pavilion.