Izuku becomes friends with a Hedgehog to escape his bullying problems during childhood. Since he left, he gave the boy a rare emerald to help him become a Hero. Years later, a mad scientist and his empire launch a massive Invasion of Earth to create a One World Government. Now, Sonic, Izuku, and other heroes join forces to stop Eggman before its too late.
The story is, well, a crossover between Sonic the Hedgehog and My Hero Academia written by Toonami4Ever
where Sonic gives Izuku one of the Chaos Emeralds to help the kid become a hero. Oh, and it's a harem story, too! The fic can be found here on FanFiction.Net. The stories version of My Hero Academia: Two Heroes can be found here.
This fanfic contains examples of:
- Adaptation Relationship Overhaul: In canon, Momo and Kendo didn't officially meet until their internship with Uwabami and neither have met Camie. Here the three are childhood friends.
- Adaptational Villainy: Some characters are far worse than their canon counterparts. Examples include:
- In canon, Kota never liked heroes at all due to his parents' deaths but changed his tune when Midoriya saves his life from Muscular. In this fic, due to Stain seeking him out, he uses Kota's hatred for heroes to groom him into his protege, resulting in him becoming a miniature version of Stain.
- Bakugo zigzags between this trope and Adaptational Jerkass. Sonic beating him in his childhood likely contributed to this as his hostility towards Midoriya becomes far more violent than it was in canon. Examples such as breaking his Chaos Emerald out of spite, beating him up for attempting to fight back, and even tried to kill him twice. His pettiness is also worse as he prevented Sonic from finishing off the Nomu just so he can have his revenge for the hedgehog humiliating him years ago, resulting in the Nomu regaining its strength and is subsequently turned into a robot by Eggman and later admits that he wished that Midoriyia was killed by the Nomu. Due to his behavior, he ends up being scouted by Eggman to join his empire.
- Shagaraki has proven himself to be far more unhinged than his canon counterpart as he used the Nomu to brutally beat and torture Izuku once his Chaos Emerald ran out of power, taking sadistic glee as he beats the poor boy to near death.
- Adaptational Jerkass: Monoma is far more snobbish. He still dislikes Class 1-A but is especially a prick to Midoriya due to the latter's achievements, which causes Monoma to demean, belittle, and insult him at every opportunity he gets. He ends up reaching an all-time low when he apathetically says that should've admit defeat to the Nomu and died, pissing off everybody that was present. And despite his claims that of how Midoriya got into U.A. by cheating, he has no problem exploiting his classmates' Quirks in order to advance to the second round at the Sports Festival, as well as robbing most of his classmates' chances. Unsurprisingly, he is hated by his peers, especially Midoriya's girlfriends.
- Adaptational Badass: Thanks to the Chaos Emerald, Izuku is able to use One For All's full power with very little damage.
- Affectionate Nickname: Several girls give these to Midoriya.
- As usual, Uraraka still uses her canon nickname of Deku. Jirou would later call him this.
- As of the Sports Festival, Tsuyu calls him Izu.
- Ashido and Hagakure calls him Midori.
- Camie near-exclusively calls him cutie.
- Age Lift: A minor one, but in canon, Camie is a second-year student. Here she's a first-year.
- Anger Born of Worry: After the USJ, Momo is so mad at Izuku for nearly dying while fighting the Nomu she slaps him.
- Ascended Extra: Characters from My Hero Academia have bigger roles in the story than they do in canon. Examples include Class 1-B, the Shiketsu High students, Stain, Kota, Nezu (and the U.A. staff to a lesser extent) among others.
- Same applies to the Sonic characters as they also have a bigger role in the plot than their game counterparts. Not only that, other characters from various continuities also appear, the most obvious example being Eggman's various assistance.
- Berserk Button: Harming, threatening, or belittling Midoriya is enough to piss off his friends, especially Bakugou and Monoma. Sonic, All Might, and Midoriya's girlfrends have a FAR stronger reaction due to their closeness with Izuku.
- Prior to the events of the prologue, Sonic watches over Midoriya and Bakugou and sees firsthand Bakugou bullying the poor kid. He reaches his boiling point when Bakugou blast Midoriya in the face just for attempting to help him up from the stream. Sonic would later save Midoriya and a boy (as well as getting his revenge on Bakugou) when the latter was about to attack the former.
- Chapter 8: When Midoriya and Kendou were about to do the Entrance Exam, Bakugou shows up and begins to badmouth as usual. When Kendou inquires why the latter calls the former "Deku" and he bluntly states its meaning, it was enough for her to nearly punch with her Quirk but is stopped by Midoriya before they could make more of a scene.
- Chapter 20: When Bakugou and his peers found out that Midoriya was injured by the Nomu, the former muses that the latter deserved it, earning him angry glares from Sonic and Tails. Later on, Monoma ends up mocking the boy for trying to fight the Nomu and that he should've died, it ticked off everyone that was present barely fighting the urge to beat his ass. He gets threatened by Momo of all people to stop insulting Midoriya or she'll personally deal with him herself.
- Chapter 26: During the Declaration of War, Bakugou and Monoma talk shit to Midoriya for what he did at the USJ, Momo and Tsuyu jumped to Midoriya's defense and call them both out for their cowardice and self-centered attitude respectively. Bakugou once again voices his displeasure for Midoriya and even admits that he wished that the latter died, which almost caused an enraged Momo to slap him.
- Chapter 27: Prior to the Sports Festival, Todoroki declared war on Midoriya, causing Momo and Ochaco to jump to his defense. Sonic later shows up and trades insults to Todoroki, then calmly states that he would kick his ass if he was in the tournament. Ironically, Sonic ends up hitting Todoroki's Berserk Button by making insults to his mother.
- Chapter 29: Iida accidentally hits Sonic's button by not only teaming up with Todoroki's team but also calling his shots on Izuku. When Sonic warns him to not risk it, he digs himself deeper by saying that he's more than willing to take the risk. It was only with the other Freedom Fighters showing up that nothing bad ended up happening.
- Chapter 32: When Shinsou ends up brainwashing Izuku and orders him to forfeit the match, Sonic ends up giving a horrifying glare that he never gave to his enemies nor his rivals. He was even going to enter the ring himself to take care of Shinsou but was stopped by Ryuko before he gets himself eliminated from the tournament.
- Big Bad Ensemble: Eggman, All For One, and Shagaraki are the stories' main villains, with the latter two opposing Eggman since he's also after All Might. This ends up resulting the villains into teaming up.
- Big Bad Duumvirate: Eggman, Infinite, Stain, and later All For One, and Shigaraki are the main antagonists, with their shared goals of ridding the world of All Might and ruling over Earth caused them to team up.
- Big Brother Instinct: Because of Midoriya being the prime target of his peers, Sonic ends up becoming rather protective over the former, and harming him is enough to make the hedgehog pissed.
- Clueless Chick-Magnet: Izuku has gained the affections of at least nine girls and seems unaware of their affection.
- Fatal Flaw: Pride. Bakugou's pride makes him very easy to manipulate into doing stupid things to a point of absurdity. Letting the USJ Nomu get away to be robotized would cause massive headaches down the road.
- Nice Job Breaking It, Hero: Bakugou's spite against Sonic successfully allows the USJ Nomu to be robotized by Eggman.
- Polyamory: As mentioned this is a harem story. Currently, the confirmed girls that will be interested in Izuku are Momo Yaoyorozu, Ochako Uraraka, Itsuka Kendo, Setsuna Tokage, Mina Ashido, Tsuyu Asui, Jirou Kyoka, Toru Hagakure, and Camie Utsushimi.
- The Tease: Momo begins to tease Izuku, both due to liking him and because she enjoys his reactions. Same applies to other females such as Mina, Setsuna, and Camie.
- Token Evil Teammate: Bakugo and Monoma are this to both 1-A and 1-B respectively due to their dickish and unheroic behavior as well as their grudge against Midoriya.
- Unwilling Roboticisation: Wouldn't be Eggman if he wasn't trying to do this to someone. He wants to subject All Might to this and succeeds with the Nomu at the USJ.
- Villain Takes an Interest: Both the Eggman Empire and the League of Villains take an interest in Bakugou due to his sheer hatred.
- Villain Team-Up: The Eggman Empire later teams up with the League of Villains due to both sides sharing the same goals.
