Using Action Replay codes in Pokemon GoldHeart remains one of the most effective ways to bypass the traditional grind of the Johto region. Whether playing on original hardware with a physical Action Replay cartridge or utilizing modern emulators like MelonDS and Delta, these hexadecimal strings modify the game data in real-time to unlock items, modify encounters, and enhance movement capabilities. As of 2026, the community has refined these codes to ensure high stability across various ROM versions, including the popular Generations hack.

Essential Item and Currency Codes

Resource management in the early stages of the Johto journey can be restrictive. These codes remove financial barriers and leveling hurdles by providing max currency and infinite rare candies. Most of these require a specific button combination to trigger after the code is enabled in the cheat menu.

Max Money (Press L + R)

This code sets the player's wallet to the maximum allowed value. It is particularly useful for purchasing expensive TMs in Goldenrod City or stocking up on Full Restores before the Elite Four.

94000130 fcff 0000
62111880 00000000
b2111880 00000000
00000088 000f423f
d2000000 00000000

x999 Rare Candies (Press L + R)

To avoid hours of grinding against wild Gravelers or Miltanks, this code populates the Medicine pocket of the bag with 999 Rare Candies. Ensure there is at least one item in that slot before activating to prevent potential indexing errors.

94000130 fcff 0000
b2111880 00000000
00000b74 03e70032
d2000000 00000000

All Poke Balls (Press L + R)

This provides 999 units of every ball type, including rare Master Balls and Johto-specific Apricorn balls like the Heavy Ball or Love Ball.

94000130 fcff 0000
62111880 00000000
b2111880 00000000
d5000000 00000384
c0000000 00000017
d7000000 00000d16
dc 000000 00000002
d2000000 00000000

Advanced Movement and Gameplay Tweaks

Quality-of-life improvements often define the modern playing experience. Movement cheats allow players to access hidden areas earlier than intended or skip tedious backtracking through caves.

Walk Through Walls (Hold L)

By holding the L button, the player character can bypass collision detection. This is a powerful tool for navigating the Whirl Islands or exploring out-of-bounds areas. Caution is advised: saving while inside a wall can result in a softlock. Always move to a valid tile before saving your progress.

9205 daa 2 00000200
1205 daa 2 00001c20
d2000000 00000000
94000130 fd ff 0000
9205 daa 2 00001c20
1205 daa 2 00000200
d2000000 00000000

No Random Battles

This code disables wild encounters entirely while active, allowing for peaceful travel between cities without the constant interruption of low-level Pokemon.

a4000130 fffc 0000
62111880 00000000
b2111880 00000000
20025a54 00000000
d2000000 00000000

Encounter and Battle Modification

For those looking to complete the National Pokedex or build a competitive team within Pokemon GoldHeart, encounter modifiers are essential. These codes allow for precise control over what appears in the wild and their attributes.

Shiny Wild Pokemon Modifier

Activating this code ensures that every wild Pokemon encountered is a Shiny variant. Note that this specific code should not be used for breeding purposes, as the modified data can sometimes cause the Day Care to produce glitched eggs.

621d1584 00000000
0206 de fc 47004800
0206 df 00 02000001
e2000000 0000003c
6800480d 490b6840
88011808 9c0d8842
40510c24 20074061
04244041 940d430c
21001c28 f06eaa0d
4801 fea 3 46c04700
0206 df 05 000000 dc
021d1584 00000000
d2000000 00000000

100% Catch Rate

This makes any Poke Ball thrown act like a Master Ball. It is highly recommended when trying to catch legendary birds or the roaming beasts (Raikou, Entei, Suicune) without the frustration of them fleeing.

9224670a 00002101
1224670a 00002100
d2000000 00000000

100x Experience Points (Hold R After Battle)

Leveling up a newly caught Pokemon to match your main party can be done instantly with this multiplier. Holding R during the experience gain screen will boost the points received significantly.

a4000130 feff 0000
1206 fada 00000068
1206fb2e 0000e03c
0206 fb 30 07808960
1206 fb 44 00000f85
d2000000 00000000
94000130 feff 0000
1206 fada 0000006c
1206fb2e 00002064
0206 fb 30 e03a4345
1206 fb 44 00008965
d2000000 00000000

Customizing Wild Encounters: The Modifier List

To encounter a specific Pokemon, use the Wild Pokemon Modifier code base and replace the aaa value with the corresponding ID from the list below.

Base Code: 52247d8c 582000c0
12247d8a 00004801
02247d8c e0021c39
02247d90 00000 aaa
d2000000 00000000

Common ID Values (Replace aaa):

  • 001: Bulbasaur
  • 004: Charmander
  • 007: Squirtle
  • 019: Pikachu
  • 092: Moltres
  • 096: Mewtwo
  • 097: Mew
  • 0f3: Raikou
  • 0f4: Entei
  • 0f5: Suicune
  • 0f9: Lugia
  • 0fa: Ho-Oh
  • 0fb: Celebi
  • 181: Jirachi
  • 182: Deoxys
  • 18c: Starly
  • 193: Shinx
  • 19a: Gible
  • 19e: Lucario
  • 1b2: Darkrai
  • 1b3: Shaymin
  • 1b4: Arceus

Using this modifier in tall grass will force the selected Pokemon to appear. If the code is active but the Pokemon does not change, try entering and exiting a building to refresh the game's encounter table.

Implementation Guide for Modern Platforms

Depending on your chosen platform in 2026, the method for inputting these codes varies slightly.

Emulator Setup (PC/Mobile)

For PC users running DeSmuME or MelonDS, navigate to the "Cheats" menu and select "Add New" or "Action Replay." Copy and paste the multi-line codes exactly as they appear. It is crucial to ensure that the "Enable Cheats" toggle is checked in the main emulator settings.

On mobile devices using Delta (iOS) or Drastic (Android), the process is even simpler. Delta often has a built-in database, but custom codes can be added by tapping the game icon, selecting "Cheats," and then the "+" icon. Ensure the code type is set to "Action Replay."

Troubleshooting Regional Mismatches

One of the most frequent reasons for code failure is a mismatch between the game's region and the code's intended target. Most codes listed here are for the US (North American) Version of Pokemon HeartGold. If you are playing the EU (European) version, the memory addresses may differ by a few bytes, causing the game to crash or the code to remain inactive.

If your game freezes upon activation, follow these steps:

  1. Disable all other active codes to check for conflicts.
  2. Verify that your L/R/Select buttons are mapped correctly in the emulator settings, as many codes require these physical triggers.
  3. Save the game normally (not just a save state), restart the emulator, and then try enabling the code again.

Maintaining Save File Integrity

While cheats offer a shortcut to power, they can occasionally introduce instability. The "Walk Through Walls" and "Capture Trainer's Pokemon" codes are known to be the most volatile. To mitigate risk, create a backup of your .sav file before experimenting with complex encounter modifiers.

In 2026, many players also use these codes in conjunction with the HeartGold Generations ROM hack. While the base codes are generally compatible, the expanded Pokedex in that version means IDs above 1ed may correspond to different Pokemon than the original National Dex. Always test new codes in a non-critical area of the game before proceeding to major story events like the Johto League or the Kanto trek.