The Myth that lead us to Kalos

Alana, the first champion of the Alola region started her adventure in Kalos to find this mythical pokemon. Lillie, gladion, and Hau accompany Alana on her journey to find out if this myth is true or false. Once Lillie came back from Kanto, she visit Alola to say "Alola" to her dear friends, thats when she heard about this mythical pokemon by Hau, Hau stated that he wants to see if the Mythical Pokemon is real or not, so he planned on visiting Kalos, while on the other hand, Alana has her personal reason to visit Kalos and same with Lillie. Once they made it to Kalos, they discover many pokemon never before seen in Alola, these "gyms", new people and these kids, Ash,Bonnie, clement and serena...a weird bunch of of potential trainers. Getting to know these kids they discover the secret bond of Ash and greninja...just what is this bond?