This Is a Pokémon Novel

In order to prevent the future from ending, Arceus sent Ryosuke back to the past, asking him to find fragments of the origin, reshape the origin, and give him some abilities. Ryosuke, who returned to the past with the 'Power of Release', embarked on an adventure to find the fragments to save the future. A water otter with ancient blood. The little black swordsman who refuses to admit defeat. A polygon born in a virtual network. A single egg cell sphere born in the laboratory. There are many, many Pokémon traveling with them. Ps: Single/multiple female protagonists, no system, multi-attribute lineup, plot-oriented game.