My Princess Academia is a crossover between Star vs. the Forces of Evil and My Hero Academia by Emma Iveli.
Star Butterfly attends UA Class 1A after starting the fire. While most of her class believe she's crazy as they don't believe she's a magical princess from another Dimension. Those the ones that do (especially her friends Izuku, Ochaco, Tenya and later Shoto) are dragged along on adventures throughout different dimensions fighting various forces of evil who want her wand!
Tropes:
- Adapted Out: Hagakure is not a member of Class 1A with Star taking her place in the story and it's unknown if she will ever appear...
- Adaptational Early Appearance:
- The Big 3 all appear much earlier with Mirio first appearing in chapter 14, Nejire in chapter 34 and Tamaki in chapter 40.
- Ryukyu is the hero that Star interns with.
- Adaptational Heroism: Lobster Claws is able to become a good guy thanks to Nezu.
- Adaptational Nice Guy: Downplayed with Ponyhead. She doesn't hate Izuku upon meeting him, instead she tolerates him.
- Adaptational Relationship Overhaul: Downplayed with Star's uncle Heartrude who in canon her relationship is unknown, but in this story is a decedent of Junstine.
- Adaptational Species Change:
- The Laser Puppies are changed to Laser Kitties.
- Thanks to Star, Mineta is turned into an elf.
- Bigger on the Inside: Part of Star's hero costume is a purse that's filled with weapons, also contains on her back up mirrors in case of emergency.
- Brick Joke: During the Heroes VS Villains exercise, Shoto asks Star if she's All Might's daughter, which she of course denies. When they fight again in the Sports Festival, she admits and she and her mother overheard his conversation with Izuku, she also tells him to stop accusing people of being All Might's children.
- Chekhov's Gag: Star in chapter 9 says if anyone harms Koji outside of a class, she would end them. In chapter 41 Mina Loveberry tries to attack him, with Star dipping down to protect him.
- Decomposite Character: Marco's role is spread out through out the various characters, often shared between Izuku, Ochaco, Tenya and Shoto in various ways though there some others such as Bakugo becoming a big brother in the future.
- Diplomatic Impunity: Discussed. The Royal Families of Mewni, including the minor kingdoms all have Diplomatic Immunity in Japan. Star and Tom agree Ponyhead must never find out about this, lest this happens.
- Even Evil Has Standards: Ludo often felt bad about Izuku breaking his bones during fights and is genuinely happy for him when he learns Izuku found a way to use his quirk without breaking them.
- Exact Words: When Star gets Tenya to promise not to go after Stain, he makes a promise not to go after him alone. Needless to say she extremely angry when she finds out.
- In Spite of a Nail: Fumikage still interns with Hawk despite not making the tournament, with Star making the joke about him being picked so that Hawks can "make a whole bird".
- Living Forever Is Awesome: Mineta once he realizes that being an elf gives him an extremely long lifespan.
- Noodle Incident: All Might once lost a bet with his former sidekick and had to guest star in a magical girl anime.
- One-Steve Limit: Mina Ashido and Mina Loveberry, while they have yet to appear onscreen together, the narration goes with Loveberry when referring to the latter.
- Our Elves Are Different: Mineta is turned into an elf, and now has a lifespan so long no one knows how long it is, he has magically good aim, and will be attractive... in a couple of decades when he grows up. He was initially mistaken for a Santa's Elf, but it turns out the proportional aging turned him into a little kid.
- Point of Divergence:
- Before canon starts, someone with an inter-dimensional Quirk travels to Mewni and makes contact with Comet, this begins diplomatic relations between Mewni and Earth.
- Star during orientation cheers "YEAH!", she also scolds Tenya for accusing Izuku of sabotaging Ochaco before the start of the exam.
- Star ends up using some kind of love spell on a couple while are a restaurant with her mother. Said couple turned out to be Bakugo's parents and a result of the spell Mitsuki is pregnant
- Shoto's team actually loses the Heroes VS Villains exercise as he ends up going against Star who is able to hold him off until the time runs out.
- Star accidentally transform Mineta into an Elf, this has effects with his aim through out the story.
- After the Monster Arm incident, Star learns a spell that not only heals bones but ligaments as well. Meaning Izuku won't have worry about losing the ability to use his arms in the future.
- Star is able to get into contact with the school thanks to one of her compact mirrors. All Might also shows up sooner because of this.
- Lobster Claws is able to have his Heel–Face Turn as after he goes on that rampage he, Star and Izuku are arrested though Nezu bails them out working out a plan with Star to make Monsters heroes on Earth.
- Thanks to the USJ and the fact that Tom triggered the school's alarm when he shows up to invite to the Blood Moon Ball, Star gives him a hard "No" to the event. However Mina is interested in going and while not perfect she and Tom end up hitting it off and begin dating.
- When Toffee is hired, he comes up with a plan to deal with Star's friends' weakness. Because of this they assumed that Ludo hired someone who was a much smarter than his usual henchmen.
- Star wins the Sports Festival. Also Bakugo isn't chained to the podium as while he is angry about losing, he does understands that Star is stronger than him and just wants to get stronger than her so he can beat her properly.
- While fighting Stain, Star actually Dips Down after she is paralyzed by his quirk.
- Thanks to Star, Ryukyu and her agency gets involved in Hosu with her sharing credit in taking down Stain with Endeavor.
- Moon shows up to talk down Mina from attacking Koji.
- Spanner in the Works:
- Midnight accidentally when Star undergoes Mewberty. She gives Star some Boy's Love manga to enjoy and ends up setting off the transformation before Nezu's planned time.
- Bakugo during Toffee's plan, he manages to over come the monsters and help his classmates chase them off.
- Spiritual Antithesis: Mewberty acts ones to Monkey and Butterfly. In this story, Nezu comes up with a plan to have Star under go Mewberity in a controlled environment to make sure no one gets hurt (though it all goes wrong). While in Monkey and Butterfly, Star's brothers take her to a certain location and watches the chaos unfold.
- Strange Minds Think Alike: Both Mineta and Tom both wished that Mina would melt Star's clothes off during the match in the Sports Festival.
