Traveling to the world of Fairy Tail, Ron becomes a healing wizard. He starts by healing Mirajane and obtains an enhanced version of the Black Dragon Sky Template, thus starting his journey to dominate!

Later, he treated Irene, Mavis, the Moon Dragon Selene, Uru, Brandish μ... and so on, which gradually increased Ron's strength and built the strongest guild, eventually ruling Ishgar, Alachidacia, Kiltina, and so on.

In the final battle against the Black Dragon, Ron, who had fully integrated the Black Dragon Celestial Template, reached the Black Dragon Acnologia's limit with just a single strike!

(Anime crossover, light novel)

Thanks for the invitation. I'm in One Piece, and I start out as Black Hairless.

Wandering the seas, free and unrestrained, but—

Why is this eagle-eyed rascal chasing me around all day? What? My son offended you? Then go find Xiao Mo! Why are you bothering me?!

Garp, why are you chasing me every day? Huh? Where's Great Britain? Can't you find it yourselves? Inviting me to join the navy? Me, the King of Great Britain, are you kidding me? No way!

Redheads? Giving you face? Not getting involved in the summit? Giving a cripple the run for his money! Asking for a beating!

Huh? I'm not that Black Hairless guy! What does your looking for Black Hairless guy have to do with my Gundam? You've got the wrong person!

"Unify the Ninja World," "Chat Group," "Multiverse," "Decisive and Ruthless," "Kushina," "Invincible"

Yu Cheng transmigrated into the body of the young patriarch of the Whirlpool Clan. Faced with the impending extermination of his clan, he dared not stop for a moment!

Fortunately, his three adopted sons were transported to the worlds of One Piece, Demon Slayer, and Martial Soul, respectively.

And so—

"Old Cheng! Is the Dark-Dark Fruit any good? Hehe... I want to use the Impure World Reincarnation~"

"Come here! Old Cheng, I'm now an Imperial Beast. Which soul beast do you want as your summoning beast? I'll teleport you there!"

"Uchiha Madara wants to fight you? And the Otsutsuki want to join the fray?! Fine, let's fight!! Behold my Sun Breathing!!!"

——————

Several years later.

Uzumaki Yu Cheng transformed into the Demon King, wielding the Supreme Great Sword, stepping on the Black Dragon Emperor, his Rinnegan lowered, looking down at the dying Allied Shinobi Forces.

"From this day forward, the ninja world will be unified. And I... will stand high in the heavens, becoming an immortal god!"

In the era of Lox, a time of warring states and legendary tales, a 15-year-old boy named Pegasus, harboring unknown ambitions and wielding a blade called Wind Chaser, embarked on a turbulent journey.

His starting point was the Rocks Pirates, the most feared and infamous pirate crew on the vast ocean.

Meiqian, a terminally ill patient, is bound to the [Naruto Live Streaming System]. In order to gain [Chakra Emotional Values] to prolong her life, she can only try her best to make a fool of herself.

Danzo: Am I the 5.5th Hokage? The First Hokage? Unbelievable!

One against seven: Forgive me, Sasgei, this is the last time...

Sasuke: My stupid brother, you picked my nose and expect me to forgive you?

...

In the year X760, a child came to this world with magical powers.

The ever-changing elemental magic...

Protoss magic that summons Protoss to fight...

A transformation spell that can greatly enhance one's strength...

Primarily a support role, it can provide buffs and additional magic to others...

And lost magic such as dragon-slaying magic and space-time magic...

[No protagonist], [Skyline], [op/ed]

Suddenly, a sky screen appeared in the Naruto world, playing a series of inexplicable videos to the whole world.

However, the video contains some unknown secrets.

At the same time, he traveled through the 99 world series and was nicknamed "Brother Cheng". The plug-in was himself.

Hokage Yang Cheng: What! Red Bean is my teacher? Then Aunt Snake is...

Devimon Yangcheng: I just want to be a kind Devimon, but the chosen children are stupid!

Shijiao Yang Cheng: Battle of wits? I've reached my combat ceiling, so why not just speedrun?

Pirate Yang Cheng: Nami is my adopted sister?

Yiquan Yangcheng: What? I'm a tentacle monster, so it's okay...

Bleach, One Piece, Naruto, Digimon, Pokémon, Re:Zero - Jobless Reincarnation, Shakugan Shana, there are so many, I'll just write whatever comes to mind...

The librarian, who was the champion of the World Swordsmanship Championship, traveled to the world of Demon Slayer during the Warring States Period, awakened the Great Swordsman System, and became a disciple of the Jigoku brothers.

From then on, he created various legends of his own in this world!

Muzan Kibutsuji: Facing Yoriichi, I can still escape, facing the librarian, I have no choice but to die! Yoriichi Tsugikuni: Your strength has surpassed mine! Demon Slayer Corps: The librarian is the most powerful man!

[One Piece + Nami (female lead) + crewmate + Morax template + time travel]

Zhongli travels to the One Piece world and merges with the Morax template.

It can manipulate all rock elements.

He then joined the Straw Hat Pirates.

"Zhongli, save me!"

After Zhongli reversed his shield, the Straw Hat crew said:

"Zhongli's shield is truly reassuring!"