Fix: Your Switch system firmware is outdated. Update your Atmosphere CFW and Horizon OS to the latest versions.

If you are seeing the keyword "400verified work" or 4.0.0a (sometimes referred to as "4.0.0a升补" or "升补" in Chinese resources), you are looking at the most recent patch released on . While the major content was added in 2018, this 2025 patch is crucial for hardware compatibility.

launched, critics and fans noted its charming but relatively short main campaign. The Official Nintendo Support site

The v4.0.0 update for Kirby Star Allies is substantial. Officially, there are two distinct but related releases: the original 4.0.0 from 2018 and the 4.0.0a from June 2025.

This was the third major content drop, transforming the game into a "complete" package. Key additions include:

: The Three Mage-Sisters, previously antagonists, are given a redemption arc in the Heroes in Another Dimension mode.

: Nintendo can detect modified software; using unofficial NSPs often results in a permanent ban from online services like the eShop and multiplayer. : Official updates from Nintendo Support

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If your verified update fails to load, check the following common roadblocks:

: Kirby uses the gathered hearts to purify the Three Mage-Sisters and

Could you tell me (Original console connected to the internet, or modified firmware) so I can guide you through the next steps?If you'd like, let me know:

Many older dumps of Kirby Star Allies circulating online are missing the final DLC or are corrupted. A "400verified work" post claims that the update to Version 4.0.0 is 100% functional.