"Okay, okay, you want strength sure as long as you sacrifice your most important thing in the world. It could be a particular emotion an ability a friend a family member anything as long you say it and I take it you'll gain your magnificent strength boy!"
"Then it seems I'll have to give away Miso Chashu Pork Ramen's existence as it's the most important thing to me in this world... is this enough lord Gorilla-sama."
"Umm, unusual choice to pick but regardless you can't live without it can you hmm."
"Yeah it's the food I live for without it I'm not me."
"Alright then your wish is now my command."
....
After Menma had completed his deal with the Draconic Primeape he felt his body felt incredible and as if with a single breath this whole earth would be evaporated and tried to control his strength, but the kids around him seemingly spouted out blood as they had holes within their chests and where he had hurt them.
3... 2... 1
"BOOOM...!!!"
The kids bodies exploded out into a million pieces as the blood and flesh splattered on Menma's body as he looked like the physical incarnation of the devil drenched in blood, but the moment this happened he freaked out I mean who wouldn't accidentally killing the kids as not even their corpses were spared.
This caused him to break down into tears for some reason as he looked at his bloody hands, and unconditionally tears flew out of his eyes, "I didn't mean.. *Sob I just wanted them to go away... they made me angry..."
As the five year old tried to make excuses to exclude him from responsibility of their deaths nothing happened as it made him feel even more guilty as his hands began shaking as his eyes became soulless in an instant who would've thought one desire would lead to ones downfall.
"You, didn't see anything did you."
Said Menma as he looked cautiously at Hinata but the young girl began crying as the scene had frightened her not to mention the eyes that the blonde was giving her she became scared, yes she felt fear from someone other than her father, but she couldn't do anything...
Menma seeing her unresponsive trudged over with blood droplets covering the ground each step he took frightened her even more as he grabbed her throat and turned her eyes to his scarlet whiskered face.
"Tell anyone of what happened and I'll kill you."
These simple words frightened her yet the admiration she felt for the boy didn't go as this all happened because of her as she was happy to see that the trash was taken out... out of existence in their case.
And soon after a weird smile formed on her mouth she said, "it's not your fault... I won't tell anyone Menma-kun."
"I'm sure you won't but if you do I'll simply twist your neck and kill you like the others."
"But Menma-kun you took care of the trash the scum of society you did a good thing why are you so scared of such heroic deeds it's just that the village doesn't see this as good because their all stubborn unchanging elders half step into their graves, you have a gift and I think together we can do big things and change this world."
"Until justice is given to every single person in the world."
....
10 Year Timeskip:
The Rookie of the year, the youngest jounin in history, the youngest Anbu commander, the youngest defector of villages, the most tyrannical ninja of the millennium...
Many names were given to Menma as he set himself on the path of 'justice' I mean there is no 'justice' it's merely what one interprets if such an ambiguous word, you know if Menma was cleaning up the trash why wasn't that 'Justice!' is it because there were people who believed they were above the law.
Wealthy, powerful, young, prodigy, immoral these were all common things he saw yet society didn't change take this for example.
The Fire Emperor's nephew took a young pretty girl from her nuptial night as she was about to consummate her relationship with her newlywed husband but it was a 'law' that the new brides would sleep with the emperor's nephew for some reason.
Menma seeing such a scene killed the crappy aristocrat in a single blow and ended the tyranny of the emperor's bloodline who thought they could do as they wanted, but this merely set off a chain reaction causing bloodshed to be waged upon this until even his most precious was killed over this trivial matter yes Hinata was killed due to his actions.
This enraged him who thought he was merely doing the right thing He believed He was right in slaughtering the emperor's bloodline I mean Who wouldn't they were a bunch of ingrates deserving death.
10 Years Later Again:
By this point Menma was the true topdog of the world but he was also bearlike as he fought with his all for this power and if any dared challenge him he'd simply kill them I mean he believed that he was stepped in blood so deep that returning was simply tedious.
And so the world knew of only one person to unite all nations that was the Avatar- I mean Uzumaki Menma the self proclaimed saviour of the world.
At this point the 'saviour' was merely a butcher as he killed with no hesitation killing entire villages if they didn't succumb to his will and so strong was he that petty eye powers had no effect on him, but one thing different because his favourite ramen no longer existed he could no longer seek solace within the broth as he vented this out to the world killing as many as he wanted when he wasn't feeling happy as if he could take life whenever he wanted.
But Goku was just happy that he'd done his devil summoning contract and went back home to have a cup of tea, unbeknownst to him though that the kid became a maniacal dictator that kills because he feels bored.