Hey so I know that I'm currently in the middle of writing Demon Fairy, but I've also been reading other fics to find inspiration and I came across a My Hero Academia story that had Izuku as Spider-Man. I then saw that the author was looking to expand that idea and write other stories similar to it with other Marvel heroes, so naturally I decided to help out by writing a story about the Hulk. Be sure to check out the Zedref's story first though since It basically inspired this one.

Go for it

Chapter 1

"Normal Speech"

"Thinking/Flashback/phone"

"BUFF ALL MIGHT SPEECH"

[Present Mic speech]

*Musutafu City, Japan*

Quirks.

They are a genetic mutation that appeared in our world many years ago. No one knows how they came to be or why they exist in the first place, but pretty soon they became the norm. These quirks gave people many different abilities. Some quirks made people faster while other allowed people to move things with their minds. This allowed on profession to become a reality to many people. Heroism.

Izuku Midoriya and his mother Inko had just come back from the doctor's office so that they could see what kind of quirk Izuku would develop, but sadly that wouldn't come to pass since the doctor had told Izuku and his mother that he would remain quirkless for the rest of his life.

This had been a big shock to Izuku, so much so that he had barricaded himself in his room while watching a video of his favorite hero All Might making his debut on repeat.

*knock* *knock* *knock*

"Izuku are you okay?" his mother asked as she walked into his room and saw him sitting at his computer.

He slowly turned around and weakly pointed to the video of All Might with tears in his eyes. "Mom, do you think I can be a hero?" he asked trying to hold back the tears.

Inko Midoriya couldn't take seeing her son like this and she could exactly answer his question, so she just cried and apologized to her son. "I'm sorry Izuku, I'm so sorry." She said as she hugged her child close to her.

Later on she decided to take Izuku to their favorite restaurant downtown to try and cheer him up. What she didn't expect was that something was currently going on downtown as they made their way to the restaurant.

*BTOOOM*

A loud explosion rocked the area that they were in.

"Izuku stay close to me sweetie!" Inko yelled out as she tried to keep her son close to her, but he had fallen down due to the force of the explosion. Soon enough a man wearing a one-piece suit glowing bright green was seen running down the street. He had a large bag with him and sirens could be heard coming from the direction in which he traveled.

. . . . . .

Meltdown was just a common criminal. He had a quirk that allowed him to control any form of radiation by absorbing it and letting it out in small doses, but he didn't have to knowledge on how to use it for anything other than petty theft. He had robbed banks in other towns before and managed to get away by threatening to make the bank a wasteland even though he could barely let out a small amount.

He had recently been wanting to make a big pay day, so he went and robbed a lab before going to the bank downtown. He managed to sneak in and absorb the radiation from an experiment by prize winning physicist Bruce Banner. Meltdown didn't know what kind of radiation had absorbed only that he had absorbed a lot of it.

When he went to the bank Meltdown made his usual threats, but he had accidently let out more radiation than he wanted to and ended up killing everyone in the bank. He panicked and grabbed as much money as he could and started to make a run for it.

Someone had saw him run out of the bank called the police, while others were calling pro heroes. Meltdown knew that if either the police or pro heroes got involved he wouldn't be able to get away. So, he began to look for someone to take hostage. That's when he noticed some kid on the street. He was small and had green hair, and he looked like the perfect hostage.

Meltdown rushed towards young Izuku Midoriya and picked him up in his left arm while holding his right hand near the child's face. Just as he picked him up the police showed up. "Not one move! If any of you makes a move before I'm safely out of here this kid is going to fry!" Meltdown threatened as the police backed off.

It seemed as if Meltdown was going to get away until…

"NO NEED TO WORRY FOR I AM HERE!" a loud booming vice declared.

Soon enough the number one hero All Might had arrived wearing a new variant of his iconic suit. Meltdown barely had any time to register the voice before it was too late.

"MISSOURI SMASH!" All Might yelled as he flew in from behind Meltdown and delivered a swift chop to the back of his neck effectively knocking him out while also catching a now unconscious Izuku.

"Izuku are you alright?" Inko asked as she slowly walked over towards her son

"MAM, PLEASE DON'T GO ANY FURTHER!" All Might said getting between Izuku and his mother. "I'M AFRAID THAT YOUR SON HAS BEEN EXPOSED TO RADIATION. I'LL TAKE HIM TO A HOSPITAL TO BE EXAMINED SINCE MY CURRENT SUIT WAS MADE TO NEGATE RADIATION."

Inko could only nod weakly as the number one hero rushed her son towards the nearest hospital.

After the fight with Meltdown, All Might rushed young Midoriya to the Mos Eisley Community Hospital. There he was screened for radiation poisoning. About an hour into the procedure his mother was brought to the hospital. After another few hours of waiting Izuku was deemed stable enough to have visitors.

"Doctor can you tell me what's wrong?" Mrs. Midoriya asked as she wanted to know if her only child's life was in any danger.

"Well Mrs., as far as our instruments can tell your son is just fine." The doctor said sounding slightly confused "Does Izuku have a quirk that can absorb radiation?"

"No, we had just gotten him screened a few days ago and the doctor at the clinic said that he was quirkless." Inko said sounding worried

"Well that's strange, we can't find any trace of the radiation in his body and he seems to be just fine." The doctor said "If it's okay with you mam I want you to bring Izuku back for a follow up examination."

Mrs. Midoriya only nodded as she went in to check on Izuku. For the next few weeks Izuku went to the hospital for regular blood work and radiation screenings hoping to find out just what had happened to the radiation that was in his body. Nothing could be found in his blood, it was as if the radiation never entered his body. The doctors thinking that this was a good sign the doctors gave Izuku a clean bill of health and he no longer had to come back to the hospital.

But what they failed to notice was that the gamma radiation had slightly altered Izuku's DNA and had unknowingly released something Incredible.

Okay so that was the first chapter of Incredible Deku (Still a working title). I just wanted to establish how Izuku got gamma radiation in his system. In the comics Bruce Banner get exposed to a large amount and it immediately turns him into the hulk. Here just a small amount was forced into Izuku's system, but it wasn't enough to trigger a transformation. Yet it was enough to bond with his cells and replicate.