TheZZAZZGlitch's April Fools Event 2021. A procedurally generated adventure, contained in a Pokémon Red save file!
Note: if you just want to play the game, you don't have to build it yourself. Visit the event site for a quick download.
You'll need RGBDS v0.4.2 or later, as well as Python 3 to run the save fixing tool.
Compile the code:
rgbasm main.asm -o main.o
Link and overlay it on top of the base save file. Will also generate the symbol list in fools2021.sym as an added bonus!
rgblink -n fools2021.sym -O base.sav -o fools.sav -x main.o
Pad and fix the save file checksums:
python3 tools/savfix.py
Your fools.sav is ready to be loaded in an emulator.