I’m afraid I don’t want to ruin your fun or opinions, but in Pokemon XY&Z ep 13
Lysandre : Alain, like I sent it to you as a data a while ago, the mega evolution energy is being accumulated favorably.
Alain : Thank you very much.
–Alain’s device was NOT detecting/reacting to mega evolution energy or Greninja/Gekkouga; That graph data was from Lysandre/Fladeri, and Alain was simply checking it. Then he noticed something(the Pokemon battle) was going on. Lysandre sent the graph data to Alain to let him know mega evolution energy is piling up well. Lysandre has never heard of Ash-Greninja stuff from Alain now.
up (in ACT II) & down (in XY&Z episode 13)
–Alain’s bracelet was NOT reacting to Ash-Greninja; it never showed any reaction. He checked it twice (when he first saw it & when he was having a battle with it), and then he confirmed Ash-Greninja happens without a stone. (the marble always glows a little, but it never shined that brightly in XY&Z ep13)
–Alain thinks Ash-Greninja is still a mega evolution thing, but it’s just “his” opinion.