The prologue and the first chapter are gonna be kinda short, but it gets longer.
Long ago, before the four heroes were known by anyone, Pokemon lived in happiness and harmony. There wasn't any conflicts or petty squabbles, only peace and kindness.
Of course, peace never lasts.
From the deepest and darkest valleys and cave a great evil arose. His armies marched across the land, consuming it in darkness, and at the head of this army sat the King of Darkness himself.
Their victories were swift and decisive. There was no one who could oppose them. The Army of Darkness had won.
Or so they thought...
From the ruins of the battles rose four heroes whose power was unimaginable. They quickly began to the army. Battle after battle, the army was quickly pushed back, and those who had survived the March were rejoicing.
The Heroes eventually came to the King of Darkness, determined to defeat him. A battle raged for days on Mount Shadow, where the King had begun construction of an enormous tower. At last, after nearly a week of fighting, the Heroes proved victorious. They preformed an ancient ritual to seal the King and his tower, Now known as the Sealed Tower, away atop the highest peak of Mount Shadow, where he would remained sealed for eternity.
Or so they thought....