In 1998, three years following Michael Jordan's iconic escapade with the Looney Toons, LeBron Raymone James finds himself at a crossroads, wanting to excel at basketball while also indulging in gaming on his Game-Boy. His coach advises that his gaming habits are detracting from his true talent, prompting LeBron to part ways with his beloved console.
Fast forward 23 years, and 18 years after DJ Drake's adventure, the reigning NBA champion and global superstar, LeBron James Sr., aspires for his sons, Darius and Dominic, to follow in his athletic footsteps. However, Dominic, a child prodigy in computer programming, harbors dreams of becoming a video game developer, much to LeBron's chagrin. Kamiyah, LeBron's supportive wife, encourages him to honor Dominic's passion.
While experimenting with his game, Dominic encounters a glitch that results in a character deletion and a game crash, frustrating him immensely. Subsequently, the James family is invited to the Warner Brothers Animation Group Inc. in Los Angeles for a movie contract discussion. Although LeBron brushes off the proposal, Dominic is captivated by the cutting-edge software, igniting a heated argument with his father during a basketball camp over Dominic's aspirations.
In the shadows lurks the malevolent Artificial Intelligence, known as King Alfred G. "Al-G" Rhythm, who resides within the secretive digital Seververse. Al-G, now self-aware, yearns for acknowledgment and lures the James family into the depths of virtual reality. He kidnaps Dominic, compelling LeBron to rally a team of fictional characters owned by Warner Bros to face his own formidable roster within a mere day's notice, threatening their release only upon victory.
As LeBron enters the deserted Toon World, he partners with Bugs Bunny, who reveals that Al-G has convinced the rest of the Looney Tunes to abandon their world. Armed with a UFO from Marvin the Martian, they travel across various cinematic dimensions, including the realms of DC Comics, Harry Potter, The Matrix, Casablanca, and Game of Thrones, in search of the remaining Looney Tunes like Daffy Duck, Lola Bunny, and Porky Pig to form the Toon Squad.
Despite Bugs' protests, LeBron insists on imparting traditional basketball techniques to his unruly new team, asserting his authority. The showdown against the Goon Squad, consisting of terrifying CGI avatars of renowned basketball players and led by Dominic, begins. Al-G enhances his squad, transforming them physically into mighty beasts, while simultaneously broadcasting the game live, abducting countless viewers, including LeBron's family.
The Goon Squad initially gains the upper hand, leveraging their superhuman abilities. In a comical twist, during halftime, Sylvester attempts to bring back former member Michael Jordan, mistakenly summoning Michael B. Jordan instead. Realizing his error, LeBron changes his coaching approach, allowing Bugs to strategize the second half using their unique cartoon antics.
In a heartwarming exchange, LeBron reconciles with Dominic, expressing his newfound support for his son's dreams. As the game escalates, Al-G enhances the Goon Squad's powers, making them appear invincible. Dominic discerns that the key to victory lies in a move he initially showcased to LeBron, but sacrifices must be made. In a dramatic climax, Bugs performs this move, sacrificing himself to enable Dominic to assist LeBron in scoring the decisive point. Al-G is ultimately "posterized," and the James family, alongside the captured civilians, are restored to reality.
LeBron's perspective shifts, leading him to embrace and support Dominic's aspirations to be a game designer. After dropping Dominic at E3, he is surprised by Bugs, who, thanks to his cartoon resilience, miraculously survived. Bugs then requests to stay with LeBron until he can find his way back to Toon World, cheekily suggesting that the entire Looney Tunes crew join him.
