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Action Replay Not Working on Pokémon Mystery Dungeon: Explorers of Time? Troubleshooting Guide

If your Action Replay (AR) works on other DS games but fails on Explorers of Time (or Darkness/Sky), the issue is almost always code/version mismatch, not hardware.

Primary Causes & Fixes

1. Wrong Game ID / Region Code

  • AR codes are tied to the Game ID (e.g., APQE for US Explorers of Time, APQP for EU).
  • If your AR firmware/code list is old, it may lack the correct ID for this specific title.
  • Fix: Update your Action Replay firmware via PC Manager software. Download the latest .codelist or .xml from CodeJunkies or GBAtemp.

2. Using Codes for the Wrong Version

  • Codes for Explorers of Time **do not work** on Explorers of Darkness or Sky (different IDs).
  • Codes for Red/Blue Rescue Team (GBA/DS) are totally different.
  • Fix: Verify the code header matches your exact cartridge label (e.g., "Pokemon Mystery Dungeon: Explorers of Time (USA)").

3. Anti-Piracy / Anti-Cheat Measures

  • Explorers of Time has checks that detect modified memory/AR presence and can freeze, black screen, or corrupt saves if triggered.
  • Fix: Use "Master Code" / "Must Be On" codes if required by the code list. Try raw/encrypted vs decrypted code formats (ARDS vs ARMAX vs RAW).

4. Save File Corruption / Slot Issues

  • AR writes to save slot. If slot is corrupted or full (3 slots max), codes fail.
  • Fix: Backup saves (via homebrew like Checkpoint on 3DS/DSi or save dongle), delete all slots in-game, start new game, apply codes, then restore save if needed.

5. Hardware/Contact Issues

  • Clean AR cart contacts (isopropyl alcohol + cotton swab).
  • Clean DS cartridge slot (compressed air).
  • Try AR in another DS/DSi/3DS to rule out console slot wear.

Recommended Workflow

  1. Update AR Firmware + Code List (PC Manager).
  2. Find verified Explorers of Time (USA) codes from GBAtemp Cheat Database or ProjectPokemon.
  3. Enable "Master Code" if listed.
  4. Test on a fresh save file.

Warning: Cheating in Mystery Dungeon can easily corrupt your rescue mail/team data. Backup saves first.

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