Guides:Coin Case ACE

This is a guide on how to execute and/or exploit a glitch. For a more technical overview of the glitch involved, see Coin Case glitch.

This page explains how to set up a Coin Case ACE setup that doesn't require a slide pokemon or Wooper/Quagsire. Instead, it makes use of a pokémon that has gained specific stat exp.

Since this is a variant of Coin Case ACE, it is only usable in the EN versions of Gold/Silver.

Explanation

When using the modern Coin Case setup, where a Bellsprout/Machop's cry and specific newly loaded tiles are buffered in memory, the game will jump to the $FA98-$FA9B range, which is echo ram containing the stat exp data of party pokémon #3.

Using specific stat exp values, we can form a jump to $CF00, which is located in the latter half of the current buffered mail. This gives us barely enough space to fix the stack and jump to the start of box names, resulting in a Coin Case ACE setup that is compatible with Wrong Pocket TM ACE box name codes.

This setup is compatible for new game scenarios, it is intended as a starting point for an easy setup, which can then be converted into a more universal Wrong Pocket TM setup.

Building the setup

1. Start the game as normal, you are free to pick any starter you want.
2. When you arrive at route 34, catch any Drowzee¹.
3. Pick up the Coin Case after you arrive in Goldenrod City.
4. Using the Drowzee you caught, defeat only the following pokémon. The order in which they are beaten doesn't matter but the Drowzee has to defeat them by itself, without sharing experience with other party pokemon.
   • Drowzee - found on Route 34 with 50% spawn odds, any time of day.
   • Oddish - found in Ilex Forest with 50% spawn odds, only during night time.
   • Oddish - found in Ilex Forest with 50% spawn odds, only during night time.
   • Nidoran♀ - Found on Route 35 with 30% spawn odds, any time of day.
5. Buy any kind of mail (Flower Mail can be found in Goldenrod Dept. Store) and give it to your Drowzee with the following content:

   

6. Go to the Goldenrod pokémon center and rename the first box name to the following:

   

7. Put Drowzee in the 3rd party slot.
8. While still inside the Goldenrod pokémon center, take the stairs up to the second floor. Save the game while you're still standing on the stairs and hard reset the game.
9. From the stair tile, take exactly 4 steps to the right².
10. Open the start menu, then listen to the cry of Bellsprout.
11. Go to the Pokémon menu and reread the abovementioned mail.
12. Open the item bag, switch item pockets at least once, then use the Coin Case.
13. You can verify that the setup works by checking the TM/HM pocket. The quantity of TM03 should now be 255.

¹Any pokémon can be used for this setup, Drowzee is merely recommended for its ability to beat the above pokémon. Especially if you are further along in the game, feel free to pick any other pokémon that can beat the required list of wild pokémon. ²If using the Coin Case results in a crash, the following locations can be used as alternatives:

• Exit the Day-care to the southern exit, then take 4 steps to the right.
• Exit the Goldenrod Pokémon center and take 4 steps to the right.

Using the setup

Now that you have set up everything, you should be able to use (nearly) all box name codes that are intended to be used with Wrong Pocket TM. In particular, you can use it to build and install a RAM writer program, which you can use to replace your current setup with one that can be used anywhere at any time.

In order to use the Coin Case ACE setup:

1. Go to the Goldenrod pokémon center and rename box names according to the box name code you wish to execute.
2. Ensure that Drowzee is in the 3rd party slot.
3. While still inside the Goldenrod pokémon center, make sure to save, then take the stairs up to the 2nd floor and take 4 steps to the right¹.
4. Open the start menu, then listen to the cry of either Bellsprout/Machop.
5. Go to the Pokémon menu and reread the abovementioned mail.
6. Open the item bag, switch item pockets at least once, then use the Coin Case.

¹In case this location crashes the game, use either of the following alternative locations:

• Exit the Goldenrod Pokémon center and take 4 steps to the right.
• Exit the Day-care to the southern exit, then take 4 steps to the right.