So, I made a patch that fixes the audio quality in the DS version of Adventure Time: HIKWYSOG.
If you’re interested, you can find it here! (https://archive.org/details/adventure-time-hey-ice-king-audio-restoration-patch-ds-ver.)
I like this game and have always wanted to fix the audio issues the DS port has since it’s the one I played first as a kid.
I’m still thinking about cracking open the 3DS version as well and seeing if I can do anything with that since it’s the overall better version of the game.
Until then, enjoy and report any issues you may encounter!