Naruto: The Life Changer - Chapter 89 -:

800 years ago, 3000 dimensional gates opened across the entire world. In that moment, it was as if 3000 different colored eyes opened across the world as hordes of monsters swarmed out of these gates like tears.

Some could destroy city walls with one strike; They had bodies the size of a giant and fed on humans

Some latched onto humans, absorbing their bodies’ nutrients and enslaving humans

Some infiltrated the humans’ cities, disguising themselves as normal human beings while feeding upon human blood to sustain themselves.

In a night, the Human race fell to the bottom of the food chain.

The world had turned into a paradise for monsters…

- Description from Novelupdates

Starting as a fallen noble? Struggling with hunger? Having to pay high taxes to the king? If you don’t pay enough, your head will be chopped off?Romon activates the Lord Simulator and begins with a village...[Your subjects discover a large amount of magic crystal ore while digging on the western side of your territory!][Your territory's culture improves, and your rapid-fire mage develops: Orbital Magic!][You successfully expand your territory and discover an underground labyrinth city on the new land!][You annex the land and gain a new title: Duke of Thune!][The king passes away, war breaks out, and you decide: to annex all lords and establish a new kingdom!]Romon: “Annexing the world is for better simulation, leading the world to ascend efficiently—how can you call it personal ambition?”

Naoki traveled to the Pokémon world to inherit a ranch, and gained the ability to use cooking to bring magical powers to Pokémon.

As a result, some strange changes occurred in the Pokémon in the ranch.

The big milk jug that can use [Super Roll] at 360 degrees without any blind angle, the motorcycle lizard that leaves afterimages everywhere it passes as fast as lightning, the twin-tailed super that can knock Kirby beasts away with one hammer Hercules the Forge…

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The wild trainer who learned the news came specially to challenge the practice.

Naoki: Has the challenger arrived?

Steward Rotom: Report to Lotto, he got into a fight with our milk cow Lotto.

- Description from novelbuddy