Another boss for ZM.
Keep the directories set up the same way upon extraction. There must be a ZM rom named "zm.gba" in the directory.
Drag the "Arachnus.asm" file on to armips and if set up properly, it will compile and output a rom named "Arachnus.gba"
I also provided a basic room and tileset alongside for a general idea of how its boss arena can look.