One day, Flash wakes up out of the blue to find himself in possession of an unusual device and no memory of how he got it. And when his home is invaded by shape-shifting monsters, he finds he will need to use that device to save his friends and family.

With the powers he now possesses, Flash must take on the mantle of hero. Along the way, he will face many challenges and uncover many secrets. He may end up sacrificing everything in order to protect his world, but he will grow stronger through those sacrifices. And eventually, he may learn to live up to the title given to him. The title of a Kamen Rider.

This story is a sequel to The Omnitrix Hero

A month after defeating Shadow and his Negative Ten, Flash is still getting used to his new Ultimatrix. Other than that, things seem to be going well. At least until a hole opens in the sky.

Just when Flash thought he could take it easy, he finds himself meeting another teen with an alien watch. And as threats from old enemies make themselves known, the two must come together in order to save their worlds.

It's the battle of the millennium, with everything they love on the line.

Written with the help of SuperSonicHeroes

Art by SlidDiamond3214

TVTropes

At one fate full night, Flash Sentry lost his parents at the alley. But on that night Flash Sentry also died that time and a will of a hero was born.
When it's night time and when the streets are filled with crimes. He watches from the shadows to see the evil and strikes. He puts fears in the heart of criminals and bring justice to all. The criminals know that he is always watching and will strike at any time. He is Vengeance!

With the distruction of planet vegeta there escape a pod with a child in it. The pod contains a baby who will soon rise to defend earth from the evil threat that will come. But there he must first become stronger so he could stop them. With the help of his friends watch his adventures and fights for him to become stronger and get the dragon balls for his wish.

The "Desire Grand Prix" is a game to protect the peace of the city from the threat of the mysterious enemy "Jyamato", whose origin and purpose are unknown.

Each participant transforms into a Kamen Rider and competes to win the game by defeating enemies and saving people.

The winner of the Desire Grand Prix will be rewarded with "the right to bring an ideal world to life" as a prize. In other words, only the true hero who wins the competition will be able to realize the world they have wished for.

A new year for the School of Friendship and the Young Six meets a new colt who transfers from a land far away. One day, a strange event happened that felt like the end of the world. A massive hole opened up and strange creatures came from out of it. The colt known as Fireheart meets one of these strange creatures after taking a walk through town. This strange creature is called a digimon and its name is Guilmon. Him and his Newfound friends soon meet more Digimon and find out not all of them are as friendly as the ones they meet. Now it is up to them to defend their world as well as save the digi world.

One day the world change. Humanity was suddenly attacked by unknown beings who could walk faster then any other and the world was on its doom. But humanity has a saviour. The savoir who will fight to save humanity from the Roidmudes as he gets ready for a drive.

A couple years after graduating from Canterlot High, the Mane Seven have entered a new phase of their lives; operating as a team of superheroes called the Crystal Guardians. As new threats rise from the new surges of magic to threaten Canterlot City, it’s up to the Crystal Guardians to keep them in check.

One month ago, a strange phenomenon suddenly fused the human world and mobian with the parallel world of Kikaitopia. Despite this, the inhabitants of three worlds, humans, mobians and Kikainoids, quickly got along and live peacefully together.

In the present, however, their lives are threatened by Kikaitopia's evil rulers, the Tojitendo Dynasty, who seek to conquer all parallel worlds. To face this new threat, a brave and energetic young man named Kaito Goshikida inherits the powers of all previous Super Sentai. Transforming into Zenkaizer, he joins forces with the Kikainoids Juran, Gaon, Magine, and Vroon , an energetic hedgehog and Flash sentry to save the multiverse from the Tojitendo and find his missing parents.

All of our world stories must go somewhere, right?

Twilight has been having dreams of her when she was younger with some girl she felt she met before, in someplace with bubbles floting everywhere.
One day, she, and Flash Sentry were transported to another world and face the threat that threatened both worlds.
When a book with a title "Brave Dragon" appeared infront of Flash because of his bravery when he face the monster, so did the sword of flames appeared as well. He knew what he had to do.

He will decide how the story will end!

This the first of a series. Hope that you all enjoy