Katsuki Bakugo, Shoto Todoroki & Fumikage Tokoyami vs. Moonfish

Katsuki Bakugo, Shoto Todoroki & Fumikage Tokoyami vs. Moonfish is a battle fought between Class 1-A students Katsuki Bakugo, Shoto Todoroki and Fumikage Tokoyami against the villain Moonfish.

Prologue
At the start of the Vanguard Action Squad's invasion, Moonfish attacks Fumikage and Mezo in the forest. Mezo saves Fumikage from Moonfish's Tooth Blades, but ends up getting one of his Dupli-Arms cut off. This grief and negative emotion fuel Dark Shadow until it goes berserk and breaks free from Fumikage's control.

Shoto carries an unconscious Kosei Tsuburaba through the poison gas filled forest with Katsuki in tow. He realizes there must be a villain using his Quirk to produce the gas and worries about his fellow student's safety. The boys must entrust their peers' safety to ragdoll and go back to camp even though Katsuki refuses to listen to Shoto.

The duo encounters Moonfish standing kneeling over Mezo's severed arm, appearing to appreciate the severed flesh. They're surprised and Katsuki asks which group was in front of them. Shoto says it was Fumikage and Mezo. Moonfish turns his attention to the students and warns them not to tempt him because he has a job to do. Itching for a fight, Katsuki asks again if the rules were not to fight.

Battle
Mandalay sends out a telepathic message granting students permission to fight the invaders. Shortly after, she sends out another message saying that Katsuki is the villain's target. Katsuki runs at Moonfish and says he could focus on taking care of himself if Mandalay got out of his head.

Moonfish suddenly sends Tooth Blades shooting out at Katsuki, taking him by surprise. Shoto acts quickly and freezes the ground to create a shield of ice that protects Katsuki. He warns Katsuki not to recklessly rush into a fight.

Moonfish suspends himself in the air by balancing on his enlarged teeth. Katsuki is annoyed that Mandalay said not to fight and then changed her mind because he has a feeling Izuku is involved. He tries to attack again but Moonfish's teeth enlarge and impede his path. Shoto expands his ice and tries to freeze the villain but Moonfish dodges and jumps into the trees. Aggravated, Shoto says Moonfish is good at moving through the forest with his Quirk and surmises that Moonfish is a seasoned fighter.

Katsuki says Moonfish looks like a weakling and starts gearing up his explosions. Shoto reminds him that they can't start fires because their classmates could die inside the forest as a result. Shoto mulls over the fact that even if they retreat there is still poison gas to their rear. He knows the villains have all the students cornered.

Aftermath
Suddenly, the rampaging Dark Shadow appeared and used its enormous claw to crush Moonfish, destroying Moonfish's teeth, much to Shoto and Katsuki's surprise. After the rampaging Dark Shadow effortlessly defeated Moonfish, Katsuki and Shoto managed to get close to Fumikage, and use their Quirks in a combined attack of explosion and flame to tame Dark Shadow.

After Katsuki once again told Fumikage that their Quirks have a bad chemistry, Fumikage thanked Katsuki and Shoto for saving him. Izuku told Fumikage that their top priority was to protect Katsuki, who was the target of the villains'.