Hacking DBZ Harukanaru Densetsu ROM hacking assistance

Khoora · Jun 24, 2026

Hey everyone who may know of and enjoyed this DS game in the past. It may seem like a boring card game to some, but it entertained me so much, and even today I like to go back to it every now n then to play some of the story mode.

I've recently gotten more into the multiplayer side of the game as I hadn't seen any recordings or mentions about it elsewhere. Furthermore, Ik that there is very little cheat codes for the game, and understandably so ig, doesn't seem like theres much to do. I feel however, since there is an entire card collection in which shows the "playable characters" (goku, gohan, vegeta, piccolo), on top of just about every other enemy/support character you can encounter for a battle, and there's also overworld sprites that exist for most if not all of them as well, that with more digging, it might be possible to switch playable characters either in the storymode or multiplayer to play as one of those enemies.

The only issue, I am unfortunately no good at game hacking at the level of looking into RAM and so on, which is why im coming here. Am hoping to eventually find someone with better experience in the field that would be willing to help me find out if this is possible or not. If anyone is willing to analyze the game and fill me in on details that would be amazing, Am willing to give a commission for the help if its wanted

Phinxx3088 · Sunday at 8:04 PM

Khoora said:
Hey everyone who may know of and enjoyed this DS game in the past. It may seem like a boring card game to some, but it entertained me so much, and even today I like to go back to it every now n then to play some of the story mode.

I've recently gotten more into the multiplayer side of the game as I hadn't seen any recordings or mentions about it elsewhere. Furthermore, Ik that there is very little cheat codes for the game, and understandably so ig, doesn't seem like theres much to do. I feel however, since there is an entire card collection in which shows the "playable characters" (goku, gohan, vegeta, piccolo), on top of just about every other enemy/support character you can encounter for a battle, and there's also overworld sprites that exist for most if not all of them as well, that with more digging, it might be possible to switch playable characters either in the storymode or multiplayer to play as one of those enemies.

The only issue, I am unfortunately no good at game hacking at the level of looking into RAM and so on, which is why im coming here. Am hoping to eventually find someone with better experience in the field that would be willing to help me find out if this is possible or not. If anyone is willing to analyze the game and fill me in on details that would be amazing, Am willing to give a commission for the help if its wanted

Hello there,
based off how you said it, it seems like you want to switch the spots of the playable characters and enemies so you can play as enemies? If this is the case then a simple cheat code seems to not be enough, that would require an entire mod. Just changing some values in the memory when the characters get called will mess the entire game up because each character probably has dialogue and a specific spot on the map linked to it. I guess one option would then simply be swapping the assets, like you change the files of character 1 and enemy 1 and rename them to one another, so character 1´s assets are renamed to enemy 1´s assets and the other way around. This would make the game call character 1 like normal but because it´s assets were swapped it´ll show enemy 1, if there are any specific gameplay features though it could be possible that enemies don´t have the needed assets for it so they could save space on the cartridge. (I don´t have much intel on this game so please take everything I just said with a grain of salt, someone else who is more specialized in ds modding might be able to help you further or atleast confirm that it won´t be possible without heavy modification)

Khoora · Sunday at 8:12 PM

Phinxx3088 said:
Hello there,
based off how you said it, it seems like you want to switch the spots of the playable characters and enemies so you can play as enemies? If this is the case then a simple cheat code seems to not be enough, that would require an entire mod. Just changing some values in the memory when the characters get called will mess the entire game up because each character probably has dialogue and a specific spot on the map linked to it. I guess one option would then simply be swapping the assets, like you change the files of character 1 and enemy 1 and rename them to one another, so character 1´s assets are renamed to enemy 1´s assets and the other way around. This would make the game call character 1 like normal but because it´s assets were swapped it´ll show enemy 1, if there are any specific gameplay features though it could be possible that enemies don´t have the needed assets for it so they could save space on the cartridge. (I don´t have much intel on this game so please take everything I just said with a grain of salt, someone else who is more specialized in ds modding might be able to help you further or atleast confirm that it won´t be possible without heavy modification)

Hey! Thanks for your response. I kinda forgot i made this post tbh lol but I have made some advancements since then. I unpacked the rom and learned a bit more about its internals via lua scripts, and indeed the checks are based on character filenames, and a full modding is required to achieve what I want. Ive decided to take my time to learn as much as possible and figure out whats needed to be changed. Its true enemies have certain less files since theyre originally not playable, but I still believe with some tweaking it should be possible to make work even if its not perfect. I dont mind keeping updated with this thread as I go

Hacking DBZ Harukanaru Densetsu ROM hacking assistance

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