Skeetendo

So I am trying to insert Green Sprites into a Red rom, but I get the following mistake:

xxx@xxx ~
$ cd pokered

xxx@xxx ~
$ git submodule init

xxx@xxx ~
$ git submodule update

xxx@xxx ~/pokered
$ make red
rgbasm -D _RED -h -o main_red.o main.asm
ERROR: main.asm(810):
        Section 'Pics 4' is too big (max size = 0x4000 bytes).
make: *** [Makefile:39: main_red.o] Error 5

Now I know that I must edit the main.asm and move a few sprites to another section. But then I get this:

xxx@xxx ~/pokered
$ make red
rgbasm -D _RED -h -o main_red.o main.asm
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
error: Unable to place 'Battle (bank 9)' (ROMX section) at $7DCE in bank $09
make: *** [Makefile:54: pokered.gbc] Error 1

...the fact is that I never edited Bank 9, and I have no idea what they mean by ROMX section at $7DCE... Could someone help?