If you’re encountering Error Code 400 in Pokémon HOME, it can prevent you from accessing essential features like trading, transferring Pokémon, or even opening the app. This kind of disruption is frustrating for players who rely on Pokémon HOME to manage their collection across devices and games. This article gives most effective solutions for resolving the error code 400.
What Causes Pokemon HOME Error Code 400?
Before diving into fixes, it’s important to understand what this error code signifies. Error 400 typically appears due to one or more of the following issues:
- Network communication failures between your device and Pokémon HOME servers.
- Corrupted app cache or data, which can interfere with loading.
- Outdated or misconfigured installations that no longer interact correctly with backend services.
Since the error can block access to core functions, resolving it quickly is key for uninterrupted use of the app.
1. Switch Your Network Connection
One of the first troubleshooting steps is to check your internet connection. Sometimes, certain networks might block or slow traffic to Nintendo servers.
Try these steps:
- Disable your current Wi-Fi connection.
- Enable Mobile Data instead and relaunch Pokémon HOME.
- If you were already using mobile data, switch to a trusted Wi-Fi network.
Changing the network often bypasses any temporary IP blocks or DNS resolution issues associated with the original connection.
2. Clear Pokémon HOME Cache and Data (Android)
Corrupted cache files are a common reason for Error Code 400, especially on Android devices. Clearing them refreshes app data without deleting your Pokémon.
This simple step fixes 90% of cases.
- Android: Settings > Apps > Pokémon HOME > Storage > Clear Cache
- iOS: Offload the app via Settings or just delete and reinstall
- Nintendo Switch: Fully close the app using the HOME button, then restart
Why this works: Corrupted cache messes up how your app talks to the server.
3. Reinstall Pokémon HOME
If clearing the cache and data doesn’t fix the issue, a clean reinstall is the next logical step. This ensures all application files are freshly downloaded.
Steps to reinstall:
- Tap and hold the app icon.
- Select Uninstall and confirm.
- Go to the Google Play Store or Apple App Store.
- Search for “Pokémon HOME” and tap Install.
- Launch the app and sign in with your Nintendo Account.
This is especially helpful if the installation became corrupted due to a failed update or interrupted download.
Deleting app (Don’t worry—your Pokémon are stored in the cloud!)
4. Log Out and Re-Authenticate Your Nintendo Account
Sometimes, token mismatches or expired sessions between Pokémon HOME and your Nintendo account can trigger communication issues.
To fix this:
- Open Pokémon HOME and go to Settings.
- Choose Sign out.
- Close the app fully.
- Relaunch and sign in again using your Nintendo credentials.
If you’ve recently changed your Nintendo password, make sure you’re using the updated login to avoid conflicts.
5. Check for Server-Side Issues
Occasionally, the problem may not be on your end. Nintendo or Pokémon HOME servers may be undergoing maintenance or experiencing outages.
You can verify this by:
- Visiting the official Pokémon support site.
- Checking the @Pokemon or @NintendoAmerica Twitter accounts for downtime notices.
- Trying again after waiting 30–60 minutes.
If many users are reporting the same issue online, it’s likely a server-side outage.
6. Disable VPN or Proxy Services
VPNs and proxies can interfere with server authentication and routing. If you’re using one, it might be triggering the 400 error.
To troubleshoot:
- Temporarily disable your VPN or proxy.
- Restart the app using a standard connection.
- If it works, consider using Pokémon HOME without VPN enabled.
7. Restart Your Device
It might sound basic, but restarting your phone or tablet can clear temporary memory and network glitches that are contributing to the issue.
Make sure to:
- Close all apps.
- Power down your device completely.
- Turn it back on and try Pokémon HOME again.
This step can sometimes resolve persistent issues that weren’t fixed by reinstalling or clearing data.
Final Thoughts
Error Code 400 in Pokémon HOME can be inconvenient, but it’s usually resolvable through a few practical steps—starting with clearing cache and switching networks. If none of the methods work, it’s worth checking for server updates or contacting Pokémon Support directly. Maintaining access to Pokémon HOME is crucial for trainers who manage Pokémon across multiple generations, so getting back online as soon as possible is key to continuing your journey.
If you’ve found another fix that worked for you, consider sharing it in the community so others can benefit.
