My name is Ammons, and I'm a villain. I can modify common sense and exchange various villainous abilities through the Demon King System to create my own Demon King powers. Reincarnated from ancient times into a useless prince, this holy mage protagonist's magic is unmatched, but your fiancée is too shy~ Your master is very charming~ And there's the genius prodigy from the Duke's family, born invincible, and your sword saint maid is very alluring! What, you're actually a little loli? Well, I'll take you all! Those reincarnated old men, overpowered protagonists, heroes, etc., with me, Ammons, you'll all suffer!

I, Uchiha Hofu, accidentally traveled to the world of Naruto.

I obtained the Multiverse Sign-in System! And I got the SSR-level treasure, the [Herrscher of Reason Core]!

I single-handedly repelled the Iwagakure army!

I led my people to evacuate Konoha and establish our own clan!

I slaughtered the darkness of Konoha—Shimura Danzo!

While chatting and laughing with Ban Ye, we decided the fate of a great nation!

I witnessed the collapse descending upon the ninja world!

I defeated the strongest enemy I have ever encountered—the Herrscher of Water!

I am the current head of the Uchiha clan, the former daimyo of the Land of Water, the five-core herrscher of the Hokage, and the demon god of the end—Uchiha Hatake!

The Otsutsuki arrives in high spirits, only to be brutally beaten by an ordinary Uchiha Jonin. That would be quite a sight!

A game combining national destiny, anime crossover, and multiverse national destiny marriage, randomly selecting a player to join. Three doors guarantee at least one level won't be dangerous. The pink door represents marriage freedom. The Dragon Kingdom: "Why are the players from the Dragon Kingdom so powerful?" The Sakura Kingdom: "Why is our Cheng-kun still holding a slime? Quickly replace him!" The Korean Kingdom: "Damn it, Oppa clearly had a chance to climb the social ladder to become one of the Four Emperors and sweep the entire battlefield." The Indian Kingdom: "Heh, they're all weaklings. Look at our Indians, even the Slit-Mouthed Woman isn't afraid." Cao Yichen transmigrates to this world without anime crossovers. With the talent granted by his transmigration, he becomes increasingly brave on the national destiny battlefield. The Sword Saintess: "It's all because of his appearance that I was rescued from the goblins when I was young." [Tsunade] [Nami] ... Protagonist: Cao Yichen

Xia Zhi, who transmigrated to a crossover anime world, suddenly found himself in a dream game. Completing tasks grants him dream points, giving him the power to modify dreams and become the master of that world. And that's not all. "The game says dream points can modify dreams, but it doesn't say it can't modify reality, right?" What he thinks becomes what he gets, what he desires becomes reality. From then on, Xia Zhi's thoughts became established facts. 100% absolute defense, millions of times damage amplification, unlimited time travel, global causal reconstruction—he imposed his will on the world, making fictional fantasies the truth, even forcing the universe's underlying logic to yield. What? The omnipotent gods wouldn't stand idly by? Xia Zhi: "This is too troublesome. I'll just add another setting." "—Declaration: There are no more gods here!"

[Marvel][Multiple Female Leads][Crossover Anime Summoning]

At the start, the Scarlet Witch's magical talent was activated by the safflower oil, and she almost got killed.

When he was short of money, he went to Hell's Kitchen to 'borrow' some money and unexpectedly obtained Tony's coordinates.

There will be a summoning event later, so please pay attention.

Transmigrating to various anime worlds, Lin Ye starts by obtaining the [Dragon God System of Myriad Realms]! Activating the Dragon God bloodline, he gains his first familiar—a healing dragon: Nanase Ren! He initially thought he had just acquired a gentle and virtuous angel in white, but the "loyalty" and "proactivity" of his dragon familiar completely exceeded his expectations! Every morning, the first thing Nanase Ren does upon waking is, under the guise of "stabilizing her bloodline," engage in deep energy interaction! "Master, my healing hand isn't powerful enough; I need you to personally 'infuse' me with dragon gold to advance!" "Master, your powerful dragon god bloodline is the only reward I crave!" Lin Ye: "Ahem! Ren, please have some self-respect! My power isn't for you to 'train'! Let's eliminate the vengeful spirits first; we'll talk about the rest later!" Nanase Ren: "Yes! For the tenfold reward promised by Master, tonight I will bring you endless experience!" Starting with Nanase Ren, Akizuki Airi, Lady Takayanagi, Esdeath, Tsunade... I, the aspiring dragon god, will conquer all worlds, starting... from being drained dry by my familiars?!

Good news, I was killed by a train at home.

Even better news: he's become the navigator of the train.

Even better news is that you can travel to the world of anime by train.

What pioneering and interesting things did you do after becoming a navigator?

She was paired with Kirito.

Adopting Lolis from All Over the World

Discussing the relationship between monarch and subjects with a famous queen

The birth of the king was celebrated with a cannon salute; God was lured onto a train; and Shiori almost fell in love with him.

Do these count?

Worlds experienced: Sword Art Online, Black Bullet, Akame ga Kill!, Date A Live, High School DxD, Guilty Crown, Academy Battle, Accel World...

(P.S.: The world-building is mostly from older anime series, with fewer newer ones.)

In the endless world, a strange legend circulates: in a special little shop, by signing a contract with the shopkeeper, one can obtain everything they desire—powerful strength, countless riches, and knowledge from another world! But few know that this shop also possesses the power to change destiny, whether past, present, or future, or regardless of race or identity. When they are willing to gamble everything to change their fate, the door to this shop will open for them, and a new destiny will be born here! "Sign a contract with me, and then—transcend destiny!!" — Meanwhile, the shopkeeper, Lan Xing, is looking helplessly at his ever-growing deficit in his account book. He doesn't know when it started, but the number of girls in the shop seems to be increasing: twin oni maids, an elf girl who loves dolls, a cat-eared blade that transforms into a sword… 'The meal expenses have gone up again this month.' He only initially wanted to reciprocate a gentleman's kindness… (Also known as the Dimensional Aid Exchange, Dimensional Oddity Store, Dimensional Exchange…)

I transmigrated and gained the power of a Stand, thinking it would be the unfolding of a shonen manga, but why is this world so peaceful?! Why am I, who's supposed to be feared by all four of them, living a peaceful life as a high school student?! Yukinoshita, don't think I really won't hit you! Kasumigaoka, can you please stop fantasizing about me being the male lead in your novel?! Shinomiya, I won't confess to you, give up! Waaah, Megumi is so much better, I need some comfort~

[Multiple Heroines] + [Slice of Life in Various Anime Crossovers]

He was transported to another world, his childhood friend was Eriri, and he even got a Spark Lens from his newbie gift pack—this was a dream start! Kamiki Kawakawa did indeed diligently "grind" for a few years, getting his fill of being the cleaner of this world.

Even the most sacred mission can't withstand the 996 work schedule! He had just made up his mind to slack off and enjoy a lazy life when he felt that the world was getting more and more strange.

Why is the school teacher named Jing Ke'ai? And why is the angelic classmate in the next class named Gabriel? As more and more familiar faces appear around him, Shen Qichuan finally realizes: he has never escaped the "plot" at all; this is actually a large-scale crossover anime film set!