Toby Fox and Camellia's Hatsune Miku Boss Theme Is Climbing Billboard's Dance Chart

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Toby Fox, known as the creator of the games "Undertale" and "Deltarune," released a new track featuring Hatsune Miku called "Cutie Mew Mew Magic" on June 24, 2026, alongside the release of Deltarune Chapter 5. The track plays during the boss battle against a character named Pink. Hatsune Miku's vocals were tuned by Japanese Vocaloid producer Camellia. Posted to Toby Fox's own official YouTube channel, the track passed 4.7 million views within two weeks. It also charted at No. 18 on Billboard's Hot Dance/Electronic Songs chart.

What To Know

For the large English-speaking Undertale and Deltarune fanbase, this track is a rare moment where a beloved Western indie game composer builds a direct bridge into Vocaloid culture — many fans are discovering Hatsune Miku's voice through a game they already love, rather than the other way around. Camellia's involvement also adds a layer that Vocaloid-scene fans will recognize: he's a well-known producer within Japan's rhythm-game and Vocaloid circles, so the collaboration connects two fan communities that don't always overlap.

Hatsune Miku's voice isn't controlled by a single "official" performer — Crypton Future Media licenses the voicebank, and any producer, in Japan or elsewhere, can use it and "tune" (adjust the pitch, timing, and expression of) her vocals to fit their own composition. Camellia tuning Miku's vocals for a track by a Western game composer is a good example of how open that system is: Vocaloid culture in Japan has always been built around this kind of producer-driven collaboration, rather than a fixed "voice actor" model.

Easy Japanese

アメリカのゲーム作家Toby Foxさんが、初音ミクを使った新曲を発表しました。日本のボカロプロデューサー「かめりあ」さんが、歌声を調整しました。