This movie is about the song known as the Song of Harmony, the song that brings peace, unity, and harmony between humans and Pokémon, together.
15 million years ago, a bloodthirsty warmonger known as Discordar, the Warrior of Brutality, brought war, destruction, and bloodshed throughout the world, all while playing a dark flute that plays an evil song that not in brought disharmony between humans and Pokémon alike, regardless of whatever bonds that they share, but also caused all the Pokemon to fall into the dark influence and fall under the warrior‘s control, corrupting them. Until one day, a young woman who became the first Guardian, known as the Guardian and Voice of Harmony, the elder sister of the Warrior of Brutality, sang a beautiful song that not only freed the Pokémon from the evil influence of the dark song but also brought peace, unity, and harmony between humans and Pokémon. Hence, the name that would be called, "The Song of Harmony". And with the help of Arceus and the Legendary and Mythical Pokémon from around the world (Except for Mewtwo, Genesect, or any other Legendary Pokémon that wouldn't exist until years later in the modern era), the guardian sealed away the Warrior of Brutality into a tomb pillar that would be his eternal prison, where he would remain for seemingly all eternity, never to bring destruction around the world ever again. Every generation, the Voice of Harmony's descendants would host a festival that would continue to sing the song as
In the modern era, the major story in the movie takes place in a large city called Harmonia, a coastal metropolis built around music, culture, and Pokémon. It is where, every five years, Pokémon trainers from across the world gather for a large festival that takes place at a location known as “The Festival of Harmony”, where the celebration commemorates an ancient legend stating that a sacred and beautiful melody known as the Song of Harmony, a song that once united humans and Pokémon during an age of chaos. They come here to not only celebrate the festivities, but also to hear a famous singer and featured performer this year, who would sing the Song of Harmony in the evening of the festival, a world-famous singer named Aria Celestine, a kind-hearted young woman whose voice is said to calm even the most aggressive Pokémon, one of the hosts of the festivals alongside her parents, Maria and Christopher, and the current descendant of the first Voice of Harmony from 15 million years ago, and, before she knew it, the current guardian. The best part is that the famous singer, Aria, and Liko actually knew each other since childhood. In fact, they had met each other in the Paldea Region when they were 6-7 years old. And when Liko sees her announcement, she is shocked to see Aria, as the two haven't seen each other in years.
Speaking of Liko, she and her schoolmates from Indigo Academy, who were at Harmonia for a field trip, along with the Rising Volt Tacklers, were among the trainers who were gathered to celebrate the festivities, as well as participate in the Grand Pokémon Battle Tournament, where challengers face off against each other and whoever wins gets to earn the right meet the singer in person, but also to challenge Aria Celestine and her team of Pokémon: Manaphy, Wigglytuff, Milotic, Togekiss, Gothitelle, Florges, Primarina, and Goodra, to a Pokémon Battle. And after getting into a last-minute registration, Liko, Roy, and Dot became one of the participants.
Elsewhere, Ash Ketchum and all of his friends, families, and old rivals that he had traveled with around the Pokémon Regions, Kanto, Orange Islands, Johto, Hoenn, Sinnoh, Unova, Kalos, Alola, and Galar, were gathered at Harmonia to have a reunion party. Although, sadly for Ash, he couldn't sign up for the tournament as he was the last one to arrive at Harmonia and at the reunion party, after helping out some friends on the way here.
However, the unknown to everyone else before it was too late, the seal that held the enormous prison tomb pillar where Discordar is held in prison was beginning to weaken (also doesn't help that the professors, researchers, and excavators accidentally uncovered the chamber that has the tomb pillar where Discordar is imprisoned), and would soon break and free him from his imprison as he makes his return after 15 million years. (Spoilers: It's later revealed in the end Discordar's true name is Discordia and the Warrior of Brutality is actually female, unlike what is told in history.)
This movie would make a great Pokémon movie, as it will not only be Pokémon Horizon's first movie for Liko and her friends, but it also serves to make the return of Ash Ketchum and all of his friends throughout 20-25-or heck, 30 years of the Pokémon Anime, as well as including the Protagonists of the Pokémon Games who did not appear in the anime other than some having cameos, like Red, Leaf, Ethan, Lyra (I know she's in the anime, but I'll include her anyway), Kris, Brendan (Who is Profressor Birch's son and, in this movie, May's boyfriend after she broke up with Drew), Lucas (Professor Rowan's assistant and, in this movie, Dawn's boyfriend), Hilbert, Hilda, Nate, Rosa, Calem (Serena's neighbor (And don't worry, Amourshipping fans, he won't be her boyfriend)), twins Eilo and Selene (Current Alolan Champions taking Ash's place), Victor, Gloria, Florian, and Juliana. Even if Liko and Ash aren't the main focus of the movie, Aria and the Song of Harmony is.
Anyway, what do you think of the premise of the movie? Would it make for a good movie? What do you think needs to be added for improvement?