Pokémon Masters EX Errors in 2025: Fix Connection, Sync & Purchase Issues

Pokémon Masters EX continues to thrive in 2025 with new features like Galactic Frontier Legendary Gauntlets and Cross-Progression Sync. Yet, errors like Error 20101 (Connection Lost) or Sync Pair download failures still plague trainers. This guide merges proven fixes with 2025-specific solutions (tested on Android 16, iOS 19, and Steam) to keep you battling without interruptions.

Pokémon Masters Error Codes

1. Error Code 20101: Connection Lost (2025 Fixes)

Why It’s Still Happening:

  • 5G/6G network handoff bugs during global co-op raids.
  • Conflicts with Cross-Progression (switching between Steam and mobile).

Symptoms:

  • “Connection lost” alerts mid-battle.
  • Frozen lobby screens during Galactic Frontier events.
Error Code 20101: Connection Lost

Fixes:
1️⃣ Switch to IPv4 Networks
Modern 2025 routers often default to IPv6, which clashes with Pokémon Masters’ servers. Adjust router settings or contact your ISP.
2️⃣ Pre-Download Event Assets
Go to Settings > Download All Assets before major updates to avoid mid-game disruptions.

2. Error Code 20103: Data Sync Failure

2025 Triggers:

  • Cloud Save conflicts between devices.
  • Corrupted data from 4K sync move animations.

Fixes:
1️⃣ Force Manual Cloud Save
Go to Menu > Account > Back Up Now to override corrupted auto-saves.
2️⃣ Free Up 20% Device Storage
Pokémon Masters EX now requires 5GB+ free space for 4K assets. Delete unused apps or files.
3️⃣ Disable Battery Optimization
Android: Settings > Apps > Pokémon Masters > Battery > Unrestricted.
iOS: Disable Low Power Mode during gameplay.

3. Error Code 20107: In-Game Purchase Failed

2025-Specific Causes:

  • Regional pricing mismatches on Cross-Progression accounts.
  • Google Play/App Store token expiration.
Error Code 20107: In-Game Purchase Failed

Fixes:
1️⃣ Use Same Region for All Devices
Purchases on Steam (EU) won’t sync to mobile (US). Stick to one region.
2️⃣ Refresh Payment Tokens
Android: Google Pay > Settings > Update Payment Method.
iOS: App Store > Profile > Payment Information > Re-enter Details.
3️⃣ Check DeNA’s Purchase FAQ
Follow this guide for flagged transactions.

Latest 2025 Error Codes

Error Code 20109: “Cloud Sync Disabled”

  • Cause: Cross-Progression conflicts with third-party apps (e.g., Discord overlay).
  • Fix: Disable overlays and re-enable sync via Nintendo Account.

Error Code 20111: “Stamina Not Refreshing”

  • Fix:
    • Unlink and relink Nintendo Account.
    • Avoid time-zone exploits (triggers anti-cheat locks).

Sync Pair Download Loop

  • Fix:

Preventative Tips for 2025

  • Daily Cache Wipe
  • Join the Beta Program: Test updates early via TestFlight (iOS) or Steam Beta.
  • Avoid APK Mods: Third-party sync pair mods trigger Error 20105 (bans).
  • Always keep eyes on their news section.

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