A Cat as My Multiverse Doppelganger, and a Digital Monster Egg from the Start

Zhang Ran transmigrates to a parallel world that has been predicted to enter an apocalypse in one year.

He also obtains a Digimon World Training System.

From the start, he has only one Digiegg. What level of Digimon hatches from it depends on the hatchling's strength and compatibility.

If their compatibility is high enough, could an Ultimate-level Digimon even hatch right from the start?

As the owner of the Digiegg, he can also copy the powers of people who have fused with Digimon and use the Joint Evolution ability.

Is the Ultimate evolution of Samurai Mon a Slaughtermon, which got instantly defeated by a Royal Knight?

Then, if he raises a Phantomon and fuses with it, could he summon a Zombie Satanmon with the combat power to match an Ultimate-level Digimon, whose final evolution is one of the Seven Great Demon Lords?

This is the story of a modern man who can't hatch any powerful Digimon, so he can only hand his Digiegg to his clone and have it search for suitable fusion partners in a crossover anime world, all in hopes of surviving the apocalypse.

This novel and its characters are entirely fictional. Any resemblance is purely coincidental. Please do not imitate.