Zelda's Adventure - Cheat Codes

Links:

Special Save Names -- Shrine Skips -- Food Dude Easter Egg -- TinyCDi Cheats

Special Save Names

Create a new file with any of these names to enable a specific effect in-game.

Shrine Skips

The collision detection of Zelda's Adventure is not perfect, best exemplified by two spots where you can skip chunks of the game.

Shrine of Air

You can prematurely enter the Shrine of Air through a specific set of movements, skipping the entire Shrine of Illusion and completing the Shrine of Earth. Enter the giant condor area from the north and wedge Zelda into the bit of land she's at in the image. You will hit a normally-inaccessible transition to the Shrine of Air and enter it early. This does not work when entering from the south or west.

Shrine of Fire

You can skip the first Warbane fight in the Shrine of Fire and grab the Celestial Sign earlier than intended. Just wedge Zelda into the northeast corner between her third and fourth hearts, and she'll clip through the wall and hit the northern transition zone.

Food Dude Easter Egg
(My greatest accomplishment)

To see this neat easter egg, you'll first need the Coal treasure, which is obtained from the miner west of the Shrine of Strength. Take it to the Great Wimbich blacksmith, who'll turn it into a Diamond that'll give you 999 Rupees.

Then, you'll need to head to G11 on the overworld map. This can easily be done by heading south twice from the goblin that gives you the Joust spell, and then heading west to a coastal area.

Finally, you must equip the Diamond and hold down Button One for seven seconds, as if you were trying to use the item. You'll see a skateboarder emerge from the bushes, shout "Radical, dude! Totally!", and then retreat into the forest.

This skateboarder is the protagonist of Food Dude, an unreleased CD-i game themed around the titular Dude avoiding junk food and cigarettes, and the ailments they would give him. They're the only assets of this lost game available as of writing. You can read more about Food Dude here.

TinyCDi Cheats

For several years, the only emulator that (mostly) supported Zelda's Adventure was TinyCDi. In short, it's a repackaged version of MAME's old CD-i emulator which had better compatibility with certain CD-i titles than the then-current version. Zelda's Adventure was one of them, and barring a freeze upon player death, the game could be fully completed. Speedrunners of that game would use TinyCDi for practice and testing, and they (specifically 0rganics) came up with TinyCDi-exclusive cheat codes for items, health, Wand power, and more. These cheat codes are what this section is about.

Nowadays, MAME's CD-i emulator has been greatly improved upon, and it can play all four CD-i Nintendo games (and other CD-i classics) without any major crashes or freezes! But it does not support the following cheats, and using them in modern MAME will likely break the emulator. However, you can use these cheats in TinyCDi and then bring the save data (in the "nvram" folder) over to the current version of MAME, and it'll work just fine.

In the emulator's "cheat" folder, put the following codes into zelda.xml:
(It is advised that you enable the codes before starting/loading a game.)

<cheat desc="13 Heart Containers">
    <script state="run">
      <action>maincpu.ppb@0007EA22=01</action>
      <action>maincpu.ppb@0007EA23=04</action>
    </script>
</cheat>

<cheat desc="13 Health (God Mode)">
    <script state="run">
      <action>maincpu.ppb@00072F2A=01</action>
      <action>maincpu.ppb@00072F2B=04</action>
    </script>
</cheat>

<cheat desc="Add Item">
    <script state="run">
      <action>maincpu.ppb@????????=01</action>
    </script>
</cheat>

<cheat desc="Modify Rupees">
    <script state="run">
      <action>maincpu.ppb@0007EA24=??</action>
      <action>maincpu.ppb@0007EA25=??</action>
      <action>maincpu.ppb@0027B79C=??</action>
      <action>maincpu.ppb@0027B79D=??</action>
    </script>
</cheat>

<cheat desc="Modify Key Count">
    <script state="run">
      <action>maincpu.ppb@0027B7CB=??</action>
    </script>
</cheat>

<cheat desc="Modify Wand Power">
  <script state="run">
    <action>maincpu.ppb@00072C83=??</action>
    <action>maincpu.ppb@00072C85=??</action>
    <action>maincpu.ppb@0007EBEF=??</action>
    <action>maincpu.ppb@0007EBF1=??</action>
  </script>
</cheat>

<cheat desc="Move During Speeches">
  <script state="run">
    <action>maincpu.ppb@0007EBF3=01</action>
    </script>
</cheat>

Here are the IDs of every item in Zelda's Adventure to go with the above item cheat: