Found a way to inject custom code into GCN and Wii games!

[CosmoCortney]

Every GameCube and Wii game has an executable .dol file inside the disk image. You can extract this file and inject your own code into it and reinsert the .dol into the game!
You just need to find a permanently executed instruction (lwz instructions are often permanently executed) and from there you can branch to an unused padding area where you can write your own code. You can use it to inject cheats into the game and do any other kinds of modifications.
Here's a demo of my current project [work in progress]:

I was inspired by the Super Mario Chaos Edition to do this. So far the result is quite good

EDIT: I can upload the modded .dol of Wind Waker PAL (GZLP01) as soon as it's finished and if uploading this file won't be against the rules (it's useless without the game, but still part of a copyrighted game..)

[Duncan Idaho]

I was aware that hackers had done something akin to this for Mh3 but I had no idea it could be done for other stuff. (Some MH3 wii mods go as far as to re texturize the entire game or even create custom quests iirc) Interesting!

[CosmoCortney]

Mario Kart Wii modding is also very popular, as you probably know.
But what I have found is about injecting cheats and custom code into the game.
Right now I'm trying to inject randomized object swaps for the red post box and grass piles in Wind Waker. Who doesn't want to be surprised by Phantom Ganondorf in Outset Island?
My Wind Waker hack has 144 lines of custom code so far
It includes some corruptions, rendering stuff from the background to the foreground, music pitching and fading effects, color shading corruption randomized by a changing float, Link's voice fonts are swapped (he screams when using the sword and meows when jumping) and much more

[Duncan Idaho]

Mario Kart Wii modding is also very popular, as you probably know.
But what I have found is about injecting cheats and custom code into the game.
Right now I'm trying to inject randomized object swaps for the red post box and grass piles in Wind Waker. Who doesn't want to be surprised by Phantom Ganondorf in Outset Island?
My Wind Waker hack has 144 lines of custom code so far
It includes some corruptions, rendering stuff from the background to the foreground, music pitching and fading effects, color shading corruption randomized by a changing float, Link's voice fonts are swapped (he screams when using the sword and meows when jumping) and much more

lol so you are basically going the Suda 51 route.

[CosmoCortney]

lol so you are basically going the Suda 51 route.

Did Suda modify games, too?


So far it's finished. Here's a demo video: