My plan is to create a patch for the .gba file that contains edited text. I have been doing so already, and am learning the ins and outs of the process:
Spoiler:
I'm also not sure if this has been attempted or maybe even successfully done before, so let me know if I'm reinventing the wheel.
What I'd like from you guys is feedback! Tell me what you think I should do with this project, help me find the more hidden errors in dialogue, or even just tell me this is a bad idea. I can take it!