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Development: I'm Fixin' It: The Pomeg Glitch

HackMew

Mewtwo Strikes Back
    • 1,314
    Posts
    18
    Years
    • Seen Oct 26, 2011

    Brief Intro

    The Pomeg Glitch is a glitch exclusive to Emerald. Since the Pomeg Berry usually lowers HP by 2, if used on a 1-HP Pokémon (Shedinja aside), the HP stat of the Pokémon could become -1, which the game interprets as 65535 (but displayed as "?35" because the game wasn't intended to display such high values).

    Description

    Here's a part of the routine coming from Emerald US v1.0:

    Code: 
    [div="font-family:consolas, courier new,monospace"]08068fd2  2900 cmp r1, #0x0
08068fd4  d104 bne $08068fe0[/div]

    Those two lines basically check the Pokémon's HP and in case it's fainted, the HP won't decrease at all. Which makes sense, but that's where the glitch come from. Checking if the HP value is 0x0 is not enough, indeed. We need to make sure it is at least greater than 0x2 before decreasing HP, which will be also useful to prevent the Pokémon to get knocked out after using a Pomeg Berry on it:

    Code: 
    [div="font-family:consolas, courier new,monospace"]08068fd2  2902 cmp r1, #0x2
08068fd4  dc04 bgt $08068fe0[/div]

    So, all you have to do is to replace 00 29 04 D1 with 02 29 04 DC.

    The Offsets


    • Emerald US v1.0

      Code: 
      [div="font-family:consolas,courier new,monospace"]0x68FD2[/div]

    This research document is Copyright © 2010 by HackMew.
    You are not allowed to copy, modify or distribute it without permission.
     
    Last edited:
    Whoa, there's a glitch like that? :D
    Gotta try it out!
     
    There's a problem with the fix - it means that the Pomeg Berry will be unusable on Shedinja. This is especially problematic, as HP EVs are useless on it and therefore people will want to remove them.

    Is it not possible to, after the HP reducing routine completes, check whether the HP is larger than the Pokémon's max HP, and if so, reduce it to 0? It would be more complex than your current method, but more effective.
     
    Wow, I never knew that. Still, it's a bit inconvenient to have to heal your Pokémon before using a Pomeg berry on it...
     
    You can't use a Pomeg Berry on a Pokémon with less than 3HP, so if your Pokémon is somehow weakened in battle, you'll have to heal it first.
    Does the game check for your Pokémon fainting upon using a Pomeg Berry (i.e. sending you to a Pokémon Center if its HP is reduced to 0)? I seem to recall that it doesn't; in that case, using a Pomeg Berry on a high-leveled Pokémon with 3HP remaining may reduce the HP to 0, allowing you to battle without any non-fainted Pokémon in your party. If it does, ignore that part :P
     
    Wichu said:
    You can't use a Pomeg Berry on a Pokémon with less than 3HP, so if your Pokémon is somehow weakened in battle, you'll have to heal it first.
    Does the game check for your Pokémon fainting upon using a Pomeg Berry (i.e. sending you to a Pokémon Center if its HP is reduced to 0)? I seem to recall that it doesn't; in that case, using a Pomeg Berry on a high-leveled Pokémon with 3HP remaining may reduce the HP to 0, allowing you to battle without any non-fainted Pokémon in your party. If it does, ignore that part :P
    Click to expand...

    No, no, no. You can use the Pomeg Berry on a Pokémon with less than 3 HP. However, it won't cause any HP decreasing.
     
    That's pretty good. Nice how Nintendo fails and ASM fixes that.
    Pretty good. Too bad I am not hacking Emerald...
     
    Last edited by a moderator:
    Bumping for usefulness, but I should also clarify for the third time in this thread that you can't use the glitch on shedinja, it has no hp evs.


    anyway nobody in this thread is listing the actual side effect of this fix: it prevents poison's tick damage at 2hp and lower

    That's it. besides that, this fix is fully functional and there are no issues with it that the player is likely to encounter.
     
    Last edited:
    Bumping to make sure everyone knows not to use this, because it breaks things.

    HackMew said:
    The Pomeg Berry is useless on Shedinja anyway, fix or not. Shedinja's HP EVs cannot increase.
    Click to expand...

    luuma said:
    Bumping for usefulness, but I should also clarify for the third time in this thread that you can't use the glitch on shedinja, it has no hp evs.
    Click to expand...

    Shedinja cannot gain HP EVs, but it can have HP EVs because it copies Nincada's EVs on evolution, including HP.
     
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