"Well, I know there's a legend that says with a Sun Flute and a Moon Flute, one can call the legends of Alola and with their aid, travel to distant lands.  It could refer to the Ultra Wormholes, which would allow us to catch up to Lusamine, as well as face the Bright One.  As for their location, I know there's a altar here on Poni Island where we should be able to find one, as well as an opposing altar where we are to play the flutes.  As for the location of the other flute, I couldn't find any info." Chuck said.