In 2024, the Transformers franchise celebrated its 40th anniversary with a special animated short produced by the renowned studio Trigger, known for its dynamic and energetic style. Rather than telling a conventional story with a linear plot, the Transformers 40th Anniversary Special Movie serves as a breathtaking, three-and-a-half-minute animated music video set to the song Mayday by the band Bump of Chicken. Its purpose is purely celebratory, designed to honor the vast legacy of the series by bringing together iconic characters and concepts from across its four-decade history.

The setting is a chaotic and vibrant mosaic of every major Transformers universe. The short eschews a single location, instead jumping rapidly between iconic backdrops and battlefields from across the franchise. Viewers witness a massive clash between an army of Vehicons from Transformers: Prime and a squadron of Autobot helicopters from various continuities. The wreckage of the Galvaburg II from Beast Wars II sinks beneath an ocean where Generation 1 Scourge and Robots in Disguise Sky-Byte struggle for survival. A naval fleet featuring massive titans like Metroplex and Trypticon engages in a distant standoff, while on land, animal-themed Maximals scout through ruined cityscapes.

There is no central conflict or dialogue, only a series of visually stunning vignettes that serve as a love letter to long-time fans. The short functions as a grand reunion, showcasing nearly two hundred characters spanning from the original Generation 1 cartoon and Beast Wars to the Unicron Trilogy, Transformers Animated, Transformers Prime, the live-action film series, and even recent entries like EarthSpark. Notable moments include a panning shot of nearly every Autobot and Maximal leader standing before the Ark, facing off against a lineup of their greatest villains, including Megatron from multiple realities. The animation is entirely hand-drawn, a deliberate choice by director Akira Amemiya to capture the visceral, tactile feel of the robots in a way that 3DCG cannot replicate.

The narrative arc is not a traditional one but an emotional and visual journey through the franchise's history. It flows from images of time-traveling devices opening portals, signifying the convergence of all timelines, into a relentless montage of battles, camaraderie, and iconic poses. It highlights moments of intense action, such as a desperate rescue on Junkion, and somber scenes, like the damaged bodies of Generation 1 Ratchet and Jazz lying in the aftermath of a conflict. The short culminates in a grand, celebratory gathering of heroes and villains, cementing its legacy not as a new chapter in the Transformers story, but as a heartfelt tribute to every story that came before.