BODY: Eagle-eyed fans poking through the legal screens of Yoshi and the Mysterious Book (ヨッシーとフカシギの図鑑) have uncovered something that quietly rewrites a piece of Nintendo history: the game runs on Epic Games' Unreal Engine 5. It's the first time a Nintendo-published title has been confirmed to use UE5, and it arrives on Switch 2 with little fanfare from the publisher itself.
The confirmation came not from a marketing beat but from the in-game "intellectual property notices" section, where Epic's standard UE5 attribution appears alongside the usual middleware credits. Nintendo, true to form, hasn't trumpeted the engine choice in any official material. Developer Good-Feel — the studio behind Yoshi's Crafted World and Yoshi's Woolly World — is widely presumed to be at the helm, though Nintendo has not formally credited them either.
For Nintendo watchers, the news is significant for what it signals. The company has historically leaned on a mix of proprietary tech and Monolith Soft–developed in-house tools, with third-party engines like Havok and CRIWARE filling in around the edges. UE5 represents a meaningfully different philosophy: a full-stack commercial pipeline with Lumen, Nanite, and a global developer talent pool already trained on it.
Whether Yoshi itself flexes any of UE5's headline features remains to be seen — the trailers so far lean on a soft, picture-book aesthetic that doesn't obviously demand Nanite-scale geometry. The interesting question is whether this is a one-off experiment or a quiet signal that the Switch 2 era will see Nintendo more comfortable outsourcing engine layers.
The insider take
In Tokyo development circles, the bigger story isn't really Yoshi — it's the hiring pipeline. Nintendo and its closest partners have long been notoriously hard to staff because of their in-house tooling; UE5 fluency is by far the most common skillset among mid-career Japanese game developers right now. A Nintendo title shipping on UE5, even a gentle one, lowers a real barrier for studios like Good-Feel to scale teams without months of internal-engine onboarding. Expect more, not fewer, UE5 credits on Switch 2 boxes going forward.
Originally reported by AUTOMATON (Japanese).