Mike's Greninja suddenly appeared infront of the group before he dropped off the other flute they needed for the Alter as he said "While Chuck and the others were getting caught in traps, I sneaked into the Poucher boss office, and found this. This means you have the Sun and Moon Flute, as for the Azure flute, I was not able to find that anywhere. If i was to take a guess, i would assume their boss has it on him at all times because of how valuable it is". He then vanished just as quickly as he had appeared.