Ben Tennyson finds himself in the Akame Ga Kill universe he finds out that there is a corrupted Empire and the Prime Minister is controlling the young Emperor to control the people. So Ben joined the assassin group Night Raid to helped them defeated the Prime Minister and bring peace in the world. BenxHarem.

Basically Fairy Tail plus Ben will watch Ben through Classic to Omniverse, I had the idea after reading the Entrapment Arc in Ultimate Fairy Volume II by PyroHelixDrago

Sylvie Phaetos aka Silvania the Ectonurite travels to Gotham City in search of Batman to find and investigate something for her cat friend Dexter/Dex-Starr. However, she stumbles around one of the underrated and wackiest heroes instead and runs into trouble. What will happen when these two cross paths? Collaborated with Alvaxerox. In Honor of Bat May.

It wasn’t an alien device that latched onto Ben Tennyson’s wrist - instead, the all-powerful mask has latched onto his head. Now, a new hero has emerged, and an interesting summer vacation is about to begin.

When regret creates a void in one's heart, it takes some time to fill it through warmth and belongingness. Hopefully Ben would find his home this time around. Op Ben. Love interest: Natasha Romanoff. No Harem. Maybe Lemons. Mostly Avengers and major canon movies would be followed. Enjoy

When Dana exhausts herself in practicing opening portals, she ends up in the Ghost Zone and Danny finds her. Can a certain dream ghost help the girl? Done as a request and co-written with Redbat132. :)

Una extraña anomalía lleva a una persona promedio a un mundo lleno de conspiraciones, existencialismos, enemigos y sucesos inesperados que superan cualquier cosa que alguna vez imaginara. Por fortuna tiene a la mano un reloj visto solo en la ficción, que usara para superar cada obstáculo que se le presente.

Luna Loss was your average little girl until one day she was kidnapped by an alien warlord after obtaining a watch-like device that allows her to transform into aliens. After escaping into space for about two years, Luna had lost all hope of going back home...but maybe a certain Mandalorian and an alien baby Jedi could help her return to Earth? Rated M-language violence and blood.

Ben Tennyson gets sent to the world of Fairy Tail where he meets the Fairy Tail wizards. He joins the Fairy Tail Guild and forms bonds with his new friends and teammates and will have many new challenges with them. BenxHarem

Al mundo haberle negado su sueño, un pequeño ser extiende su mano en aquella chica la cual sería la balanza que mantendría al mundo en equilibrio con su ahora poder aferrado a su brazo izquierdo. Explorando su viaje desde el primer día que se le dio el Omnitrix hasta el final donde se mantendría en pie como la última esperanza.

its going to be fun.what if Izuku had ultimatrix and one for all

While fighting both Kevin and Vilgax at Niagara Falls both them and Ben get sucked into a portal created by the Null Void projector. Only it’s not the Null Void they land. They land in a world where Superheroes are just a bunch of corporate puppets and think they can do whatever they want. But no it’s a real Hero’s Time.

Waking up against grass in the middle of a park? Weird but I can deal. Waking up in a different body? Still weird, but atleast I'm taller. Waking up with an Ultimatrix on my arm? Well fuck everyone else, I'm winning! Waking up in Brockton Bay? ... Well shit. SI into Worm with an Ultimatrix. I'm kinda an asshole though.

Being transported to a world different from his, Percy discovers a way to defeat Kronos in his original world. The problem? The solution to his problem is wrapped around the wrist of a 10 year old kid who's guardian is more than unwilling to allow the kid to save Percy's world. Going through drastic measures, he strives to find a way to obtain the key, making unusual allies.

Lincoln found this watch that allows him to turn into 10 different aliens. He'll use his new powers for good with the help from Clyde and Ronnie Anne.

A Ben 10/One Piece crossover; I woke up this morning with this on my mind, and I had to share it with you all! I hope you enjoy. It's going to be a task I hope you'll enjoy. [Bonus: Ben will have the Ultimatrix (Well an O.C version called the M-Model; He also has the Haki's; all three. but he'll have to get training to access them full time)]

Ben Tennyson was sent to investigate some portals called Spatial Quakes, while they are created by human-like aliens called Spirits. So Ben meets Shido Itsuka and helps him seal the Spirits' powers away and save them from danger by making them fall in love and go on dates.

To walk a mile in somebody's shoes is an exhilarating thing to experience when you can walk a mile as eleven different aliens. So buckle up for a wild ride for a summer vacation you will never forget with the most baddest kid to save the day. His smart, creepy, fast and strong, his every every shape and size because because if you see him, you're in for a surprise from. Izuku 11

Izuku Midoriya is about to give up on his dreams of heroism when a teenager clad in a green jacket and a man claiming to be a professor break into his room in broad daylight. Ben Tennyson and Professor Paradox have travelled to the My Hero universe in order to find a worthy successor to wield the Omnitrix once Ben passes... and they firmly believe Izuku is worthy to inherit it.

After a grave defeat, Ben loses hope in being a hero but after some unexpected circumstances, the wielder of the Omnitrix is transported to a world filled to the brim with heroes. Having to adjust to not only a new country but also going to school to be a hero Ben has plenty of challenges ahead.

this is the story about what happened to Sunset Shimmer doppelganger from the the Equastria girls universe, Dawn Pear is one of the many Omnitrix wielders in the multiverse and the defender of her universe and the universe of Equastria

Ben Tennyson hero of the universe was sent to Japan to finish his last two years of high school in a town called Kouh. There he will meet the High School DXD cast and face many Supernatural threats (Devils, Angels, and Fallen Angels) together.

Side Stories of Yukiko and her family during their summer vacation! Filled with humor, friendship, romance, and lots of property damage!

Rito Yuuki thought his life wouldn't get strange when he was ten and a comet came down to Earth on that starry Friday Night. But now, at the age of fifteen, and is known as the Galaxy's Greatest Hero. There's one minor problem, he can't confess to his childhood friend, Haruna. And to make matters worse, he somehow ends up engaged to the Princess of Deviluke. (Full Harem in Notes)

A watch-like device falls from space and attaches to Gus Dalton and gives him the power to transform into different aliens. Now he, Luz Noeda, Willow, and others must work together to stop criminals in their summer vocation.