So I've been working on some drawing and BG tools for the past few years now, am I allowed to use these? Also any reccomendation for tools for sounds?
You can use any tools you want. For music I use OpenMTP, and usually people use maxmod to play them on GBA. For sound effects, no idea, but maxmod can also play them.
Hey thanks for the reply. Is openMPT easy to use? I can't seem to find much on tutorials for it.
It shouldn't be too hard: https://wiki.openmpt.org/Tutorial:_Getting_Started