Mew Won't Follow After Cheat Code in Pokémon Emerald – Causes & Fixes

Using a cheat code to catch Mew in Pokémon Emerald likely corrupted the "follow me" flag or related data in your save file. Cheat devices (Action Replay, GameShark) write directly to memory and often cause side effects.

Probable Causes

• Incorrect/Incomplete Code: Wrong version (US/EU/JP), typo, or code only spawns Mew without setting obedience/follow flags.
• Overwritten Data: Code wrote to adjacent memory addresses controlling party behavior.
• Version Mismatch: Code for Ruby/Sapphire or FireRed/LeafGreen used on Emerald.

Potential Fixes (No Guarantees)

1. Restart Game (Soft Reset): Sometimes resets temporary flags.
2. Use a Save Editor (PKHeX): Load your .sav on PC, check Mew's "Met Location," "Obedience," and "Following" flags. Set "Following" to valid map/offset. Backup save first.
3. Re-catch Legitimately: Trade Mew from a legitimate source (event distribution, Pokémon GO via HOME, or another save).
4. New Game: Only sure fix—erases all progress.

Lesson: Cheat codes on GBA games frequently break scripts/events. For future playthroughs, use legitimate methods or well-tested codes from trusted databases (e.g., ProjectPokémon).