To date, this is the last Pokemon movie to take place in the main series' continuity.
The next generation Pokémon in this movie is #801, Magearna. It is the Generation 7 Mythical Pokémon as well.
After the flower field is destroyed by the flying fortress's laser, the sound of Magearna screaming is removed from the dub.
This movie's introduction shows the beginning of Alain's battle with Korrina, the resolution of which was seen in Find Melecie! Numelgon and Dedenne!! (2016).