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Strange area specific effects of wrong pocket HM07 (EN Pokémon Gold and Silver)

2,564 views · Published 9 April 2018 · 5:33 · Indexed 23 October 2026

Channel: Evie (ChickasaurusGL) 🌺 · 2018 · Gaming

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As is relatively well known now, TMs and HMs outside of the TM/HM pocket will have an invalid effect in Generation II.

HM07 is one of the few ROM executing wrong pocket TMs and HMs which doesn't just freeze the game or seemingly do nothing.

Upon using HM07 twice, there is a chance for you to get an interesting corruption effect. Upon using it one step outside of the Pokémon Center in Goldenrod City, you can get a glitched text box which corrupts your walking animation after you press A.

I've found that Goldenrod City Department Store (for the spot you are when you just get in),  Cinnabar Island (Fly spot), Blackthorn City and one spot left from the Fly spot for Goldenrod City also may have interesting effects though I've only got those to result in a freeze.

HM07's execution pointer is at 1BCB in the ROM.


GameShark code (HM07 is first item in Balls pocket):

01F9FDD5

To get this with arbitrary code execution, modify address D5FD to F9.

This glitch item also seems to be capable of causing arbitrary code execution, but this hasn't been researched yet and TM17, TM21, TM25 is better at it.

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