What Is Kaeru Team and How Do Its Nintendo Revival Services Work?

Kaeru Team is a small volunteer group that reverse engineers and rebuilds network services for discontinued Nintendo platforms, including the 3DS, DSi, and Wii U. Its projects restore online features and preserve user-generated content after Nintendo's own servers shut down. Which project applies to you depends on your console and game: some services need no modification at all, while others require an Android patcher app or a jailbroken iOS device.

What Kaeru Team actually does

The team describes its work as giving old systems new life "even when Nintendo no longer provides support for them," and as preserving significant user-generated content. In practice that means two kinds of projects:

• Replacement servers for games and apps whose official online services were terminated.
• Homebrew and patching tools that let legitimate installations or unmodified consoles connect to those replacement services.

The team is listed as Lauren Kelly (thejsa), team lead and Kaeru Gallery developer; Shutterbug2000, reverse engineer and developer of Kaerutomo and mobile servers; FairPlay137, Kaerutomo development; and JoshuaDoes, development.

The projects and what each one revives

Kaeru Gallery (Flipnote Studio 3D)

Kaeru Gallery is a replacement server for Flipnote Studio 3D. This is the project most directly tied to the Flipnote/うごメモ ecosystem, where Nintendo's original sharing infrastructure (including the Hatena-run services) no longer operates. If your goal is to keep sharing or viewing Flipnotes through Flipnote Studio 3D, this is the relevant project.

Kaeru WFC (Nintendo DS online play)

Kaeru WFC lets Nintendo DS users play online using Wiimmfi without homebrew or romhacks. That makes it the lowest-friction entry point in the lineup: you are not modifying the console or the game, so there is nothing to install beyond what the Wiimmfi connection requires. If you have a DS and want to play a supported title online again, start here.

Kaerutomo (Miitomo)

Kaerutomo is a custom Miitomo server that renders the app functional again after its official shutdown. Because Miitomo was a mobile app, using it involves the mobile patching route rather than a console.

Kaeru Duel (Pokémon Duel)

Kaeru Duel is a replacement server compatible with Pokémon Duel, bringing online functionality back to the game after its shutdown. Like Miitomo, this is a mobile app, so the same patching considerations apply.

Kaeru Patcher for Android

Kaeru Patcher is an Android app that patches legitimate installations of supported apps so they connect to the team's revival services. The key detail is that it modifies an app you already have installed rather than distributing the app itself. If you are on Android and want to use Kaerutomo or Kaeru Duel, this is the tool that bridges the two.

Kaeru Team Repo for jailbroken iOS

On iOS, the team states that users need a jailbroken device to use the revival services, which are enabled by "tweaks." This is a hard requirement, not a preference: the iOS security model prevents the same patching approach used on Android, so there is no non-jailbroken path described.

How to choose the right project

Work backwards from your device and your goal:

1. Nintendo DS, want online play → Kaeru WFC. No homebrew or romhacks required.
2. Flipnote Studio 3D, want sharing back → Kaeru Gallery.
3. Android phone, Miitomo or Pokémon Duel → install Kaeru Patcher, then patch your existing legitimate installation.
4. iPhone/iPad, Miitomo or Pokémon Duel → you need a jailbroken device and the Kaeru Team repo tweaks.

Each project page on the site carries its own "More details" link, and setup instructions differ per project, so follow the specific page rather than assuming one method transfers to another.

Limitations to keep in mind

• Platform coverage is specific. The team names the 3DS, DSi, and Wii U as console targets, plus mobile. A revival service for one game does not imply support for others.
• iOS requires jailbreaking. The page states this as a consequence of Apple's security model, so there is no official workaround.
• Android patching targets legitimate installs. Kaeru Patcher patches apps you already have; it is not a distribution channel for the apps themselves.
• These are community-run services. They exist because volunteers reverse engineered the original protocols, not because Nintendo supports them. Availability and behavior depend on the team's ongoing work.
• Pricing and account requirements are not stated on the source page. Do not assume a service is free, paid, or login-free based on this overview; check the individual project page.

For anything beyond this summary, the authoritative source is each project's own detail page on kaeru.world.