If you think about it, Teal Mask has the player save Ogerpon in a much similar way as Ash saved Latias in Movie 5. They are also both girls who lose or lost someone dear to them and also find a new friend they become overly attached to. The main difference is Ogerpon goes with the player, whereas Latias is left behind by Ash. So, in essence, Ogerpon is meant to recreate the experience we had with Latias before and it appeared to work just as well as it did back then for people.