"My Hero Academia Smash!!" is a comedic spin-off of the popular manga series "My Hero Academia," created by Kohei Horikoshi and illustrated by Hirofumi Neda. The series parodies the original story, reimagining its characters and events in a humorous, exaggerated style. The narrative retains the core premise of a world where superpowers, known as Quirks, are commonplace, and aspiring heroes train at U.A. High School to become professional heroes. However, the spin-off takes a lighthearted approach, focusing on absurd and over-the-top scenarios rather than the serious tone of the original.

The protagonist, Izuku Midoriya, still dreams of becoming a hero despite being born Quirkless. After inheriting the powerful Quirk "One For All" from the legendary hero All Might, he enrolls at U.A. High. In "My Hero Academia Smash!!," Midoriya's journey is depicted with a comedic twist, often highlighting his awkwardness, overenthusiasm, and frequent mishaps. His classmates, including the explosive Katsuki Bakugo, the reserved Shoto Todoroki, and the bubbly Ochaco Uraraka, are also reimagined with exaggerated traits for comedic effect. Bakugo's temper is amplified to ridiculous levels, Todoroki's stoic demeanor is played up for deadpan humor, and Uraraka's cheerful personality becomes even more whimsical.

The series frequently parodies key events and arcs from the original manga, such as the U.A. Entrance Exam, the Sports Festival, and the battles against villains like the League of Villains. These moments are reinterpreted with slapstick humor, absurd dialogue, and fourth-wall-breaking jokes. For example, All Might's iconic catchphrase "Plus Ultra" is often used in nonsensical contexts, and the villains' schemes are portrayed as hilariously inept. The spin-off also introduces original gags and scenarios, such as characters breaking into spontaneous dance routines or engaging in nonsensical competitions.

The art style of "My Hero Academia Smash!!" is simplified and cartoonish, emphasizing exaggerated expressions and dynamic poses to enhance the comedic tone. The series does not follow a continuous plot but instead consists of self-contained chapters, each focusing on a specific humorous situation or character interaction. This episodic structure allows for a wide range of comedic scenarios, from classroom antics to bizarre training exercises.

Overall, "My Hero Academia Smash!!" serves as a comedic counterpart to the original series, offering fans a chance to see their favorite characters in a new, humorous light. While it does not contribute to the main storyline, it provides an entertaining and light-hearted take on the world of "My Hero Academia," appealing to readers who enjoy parody and slapstick comedy.