Ratatata

On May 16, 2024, a teaser video announced the two bands had collaborated on a single called "Ratatata", to be released on May 23. They played the song live together for the first time during Babymetal's Fox Fest in Saitama on May 25. The bands later collaborated on a mobile game that featured the song on its soundtrack.

Following the song's release, Babymetal revealed in interviews the collaboration happened because they wanted to create a song similar to Electric Callboy's track "We Got the Moves", as they enjoyed the audience participation that was an important component of the song during live shows; struggling to write a new song in this vein, they contacted Electric Callboy directly for advice, which instead led to the two bands collaborating on the song that became "Ratatata".

The music video for the song was directed and produced by Schillobros, a film production company founded by Electric Callboy's rhythm guitarist Pascal Schillo, and was released alongside the single on May 23, 2024. As of July 2026, it has over 62 million views on YouTube.

The song served as the main theme for the 2024 WWE pay-per-view Bash in Berlin, and was featured on the soundtrack of the video game WWE 2K25 the following year.

Speaking for Consequence, Jon Hadusek described the two bands as "two of the most prominent practitioners of 'dance metal'" and that the song "lives up to its billing [...] tech-y metal riffs are infused into a pulsing EDM beat, over which Babymetal and Electric Callboy share vocal duties, the former handling the higher melodies and the latter providing the gutturals and metalcore vox".

Credits adapted from Tidal.