I will update the next chapters on Sunday and Monday respectively.
Also MC having Yan Sen's template has Life Manipulation.
The user can control or influence the very essence of life, which is a defining characteristic of organisms with biological processes. This power encompasses a wide array of effects, intricately tied to the concept of life itself—a concept both complex and indefinite. Users of Life Manipulation can wield their abilities in both creative and destructive ways, impacting life forms and their essential vitality on multiple levels.
The user can enhance or diminish the life force of living beings, boosting their physical strength, health, and energy, or conversely, weakening them or hastening the aging process. They may alter the natural lifespan of organisms, either halting aging to grant immortality or accelerating decay. They can create life, infusing it into inanimate objects or forms, granting awareness, sentience, or full biological functions, which could range from animating statues to creating entirely new species of flora or fauna. In more miraculous feats, users can resurrect the dead, bringing them back in their original form or reincarnating them into new life forms, though such acts may come with limitations or require special conditions.
So MC has created Pokémon for fun at star and kept in a pocket dimension realm linked to him.
He will create some character like Hei Qing from Battle through the heavens. Or Alchemists like Yao Lao, Albedo and Sucrose from Genshin.
Maybe summoning card is more apt in later case.