Keroro Heichou is back on the big screen for the first time in 16 years. New Theatrical Version Sgt. Frog: Upon Revival, Immediately Facing the Threat of Earth’s Destruction! (新劇場版☆ケロロ軍曹 復活して速攻地球滅亡の危機であります！) opened in Japanese cinemas today, June 26, 2026 — and the 20th anniversary theatrical comeback arrives with one of the most unexpected crossovers in recent anime memory: Mobile Suit Gundam.

What the Sgt. Frog 2026 Anime Film Is About

The Keroro Platoon — the lovably incompetent alien invaders who have spent years failing to conquer Earth while living rent-free in the Hinata family basement — find themselves in an unlikely role reversal. When mysterious phenomena begin striking Japan nationwide and an unknown threat puts Earth on the brink of destruction, it falls to Keroro and his squad to defend the planet they were supposed to be conquering.

The 109-minute, G-rated film is directed by Yūichi Fukuda, best known internationally for helming the live-action Gintama films, with Fumitoshi Oizaki serving as assistant director. Animation is handled by BN Pictures, distributed by KADOKAWA and Bandai Namco Filmworks. The theme song, 「また帰ってきたケロッ！とマーチ」 (“We’re Back Again, Kero! March”), is performed by singer-songwriter ano.

The Gundam Crossover Nobody Saw Coming

Here is the part that broke the internet in Japan back in June: the film features an official Mobile Suit Gundam crossover. The iconic RX-78-2 Gundam and Char’s Zaku II make dramatic appearances in the film’s climactic battle — a surreal collision of two of Bandai Namco’s biggest properties that feels completely at home in Keroro’s absurdist universe.

To mark the collab, legendary Mobile Suit Gundam: The Origin creator Yoshikazu Yasuhiko — the original character designer for the 1979 Gundam series — drew a series of exclusive crossover illustrations placing the Keroro cast alongside Gundam pilots Amuro Ray and other iconic characters. Sgt. Frog creator Mine Yoshizaki contributed pieces on the Keroro side. The resulting artwork is genuinely stunning, blending Yasuhiko’s classic linework with Keroro’s chibi frog designs in a way that somehow works perfectly.

On the merchandise side, a limited Keroro Robo Mk-II Titans Color Gunpla kit (¥2,200) launched on June 26 alongside the film — a Gundam-style model kit of one of Keroro’s signature mechs done up in Titans dark blue, which is a crossover product that manages to be both ridiculous and highly covetable.

New Characters: Twin Brothers from Planet Keron

The film introduces two new characters: Aruru and Deruru, twin brothers from Planet Keron with a mysterious past connection to the Keroro Platoon. Both are voiced by Jesse, a member of the popular Japanese boy group SixTONES. The original Keroro voice cast returns in full: Kumiko Watanabe as Keroro, Etsuko Kozakura as Tamama, Jōji Nakata as Giroro, and Taketo Yasui as Kururu.

Can Singapore Fans Watch Sgt. Frog?

For Singapore fans, the situation is familiar: the film opens today in Japan, and there is no confirmed theatrical or streaming release for Southeast Asia at this time. Sgt. Frog has strong roots in the region — the original 358-episode anime series aired extensively on Animax Asia, so a generation of Singapore, Malaysian, and Indonesian anime fans grew up watching Keroro’s botched invasion attempts. The franchise has a genuine following here.

Whether the film eventually surfaces on Crunchyroll (which holds streaming rights for much of the Keroro back-catalogue in SEA) or finds its way to physical release is to be confirmed. Crunchyroll has not announced a streaming date for the film as of publication. Import Blu-ray from Japan is likely the first option for the most eager fans, and Japanese retailers will typically ship to Singapore.

Regardless of how or when Singapore fans can watch it, the fact that Keroro is back on the big screen — and teaming up with Gundam of all things — is worth celebrating. Sixteen years is a long wait. It sounds like it was worth it.

Sources: Anime News Network (English); Anime News Network (Gundam crossover) (English); BN Pictures official site (Japanese). Check our Manga & Anime coverage for more.