Plaguemon compiles! ...mostly

Blaze@School-Laptop /cygdrive/c/Users/Blaze/Documents/ROMs/Sources/Plaguemon
$ make
WARNING: <_io.BufferedReader name='gfx/player_title.png'>: Color {'r': 247, 'g': 247, 'b': 247, 'a': 255} truncated to {'r': 0, 'g': 0, 'b': 0, 'a': 255}
WARNING: <_io.BufferedReader name='pic/trainer/red.png'>: Color {'r': 247, 'g': 247, 'b': 247, 'a': 255} truncated to {'r': 0, 'g': 0, 'b': 0, 'a': 255}
rgbasm -D _RED -h -o main_red.o main.asm
warning: main.asm(48) -> engine/overworld/movement.asm(225) -> lb(1):
    Left shift of negative value: -1
warning: main.asm(937) -> engine/trade.asm(657) -> lb(1):
    Left shift of negative value: -4
warning: main.asm(1961) -> engine/town_map.asm(450) -> lb(1):
    Left shift of negative value: -4
warning: main.asm(48) -> engine/overworld/movement.asm(225) -> lb(1):
    Left shift of negative value: -1
warning: main.asm(937) -> engine/trade.asm(657) -> lb(1):
    Left shift of negative value: -4
warning: main.asm(1961) -> engine/town_map.asm(450) -> lb(1):
    Left shift of negative value: -4
rgbasm -D _RED -h -o text_red.o text.asm
rgbasm -D _RED -h -o wram_red.o wram.asm
rgblink -n pokered.sym -l pokered.link -o pokered.gbc audio_red.o main_red.o text_red.o wram_red.o
rgbfix -jsv -k 01 -l 0x33 -m 0x13 -p 0 -r 03 -t "PLAGUEMON" pokered.gbc
printf '\xB0' | dd conv=notrunc of=pokered.gbc bs=1 count=1 seek=318
1+0 records in
1+0 records out
1 byte copied, 0.0042868 s, 0.2 kB/s
rgbfix -v pokered.gbc
sort pokered.sym -o pokered.sym
rgbasm -D _BLUE -h -o audio_blue.o audio.asm
rgbasm -D _BLUE -h -o main_blue.o main.asm
warning: main.asm(48) -> engine/overworld/movement.asm(225) -> lb(1):
    Left shift of negative value: -1
warning: main.asm(937) -> engine/trade.asm(657) -> lb(1):
    Left shift of negative value: -4
warning: main.asm(1961) -> engine/town_map.asm(450) -> lb(1):
    Left shift of negative value: -4
warning: main.asm(48) -> engine/overworld/movement.asm(225) -> lb(1):
    Left shift of negative value: -1
warning: main.asm(937) -> engine/trade.asm(657) -> lb(1):
    Left shift of negative value: -4
warning: main.asm(1961) -> engine/town_map.asm(450) -> lb(1):
    Left shift of negative value: -4
rgbasm -D _BLUE -h -o text_blue.o text.asm
rgbasm -D _BLUE -h -o wram_blue.o wram.asm
rgblink -n pokeblue.sym -l pokered.link -o pokeblue.gbc audio_blue.o main_blue.o text_blue.o wram_blue.o
rgbfix -jsv -k 01 -l 0x33 -m 0x13 -p 0 -r 03 -t "POKEMON BLUE" pokeblue.gbc
printf '\xB0' | dd conv=notrunc of=pokeblue.gbc bs=1 count=1 seek=318
1+0 records in
1+0 records out
1 byte copied, 0.008338 s, 0.1 kB/s
rgbfix -v pokeblue.gbc
sort pokeblue.sym -o pokeblue.sym