My Hero Academia Codex

Joint Training Battle

Rivals become allies in a high-stakes battle that redefines hero cooperation.

The Joint Training Battle is a pivotal training arc where Class 1-A and Class 1-B unite under the guidance of their homeroom teachers to test their skills in mixed teams. Designed to bridge the gap between the two classes following the U.A. Sports Festival, this event challenges students to cooperate with rivals while facing increasingly difficult combat scenarios that push their Quirks and teamwork to their limits.

Event Type
Joint Training Exercise
Location
U.A. High School Grounds C
Primary Instructors
Aizawa Shota, Vlad King
Participating Classes
1-A and 1-B
Outcome
Class 1-A wins the final round; both classes gain mutual respect

Lore & Background

The event served as more than just physical training; it was a psychological crucible that forced students to recognize the unique strengths of their peers. As the battles progressed, the initial hesitation gave way to seamless coordination, with Class 1-A's individual powerhouses learning to complement Class 1-B's tactical and support-heavy Quirks. The climax saw a dramatic shift in dynamics, proving that heroism is not defined by solitary glory but by the ability to synchronize diverse abilities for a common goal.

In Their Own Story

The air crackled with static as the barrier between the two classes dissolved. On one side stood Izuku Midoriya, his eyes darting across the field, calculating angles; on the other, Tetsutetsu Tetsutetsu grinned, steel skin gleaming under the artificial suns of Ground C. 'Ready to lose?' a voice called out from the opposing formation. The ground shook as the signal fired, sending a chaotic symphony of explosions, ice, and energy beams colliding in a cacophony that echoed the true spirit of heroism: not fighting alone, but fighting together.

Reader's Guide

The arc begins with Aizawa and Vlad King explaining the rules for three separate rounds designed to test cooperation. The first round involves teams capturing flags from the opposing side while navigating obstacles, highlighting early friction between the classes as they struggle to trust one another's strategies.

In the second round, a rescue simulation forces students to evacuate civilians from a collapsing structure while fending off villains played by their peers. This phase reveals hidden strengths in Class 1-B, particularly in support and tactical coordination, earning genuine admiration from Class 1-A members who had previously underestimated them.

The final round escalates into an all-out battle where the two classes face each other directly. Despite Class 1-A's individual power advantages, they initially falter against Class 1-B's cohesive teamwork. However, through adaptive strategies and newfound trust, Class 1-A eventually secures victory in a dramatic finale. The event concludes with both classes acknowledging each other as equals, fostering a lasting sense of unity that benefits their future hero careers.

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