You can even edit or create your own graphics using YY-CHR, extracting, drawing and inserting in your hack.
You can also "take" or better say, rip the graphics and insert in Map 16, even taking from another game.
Even merging these two things with Exanimation!!
In these tutorials:
I hope it helped you, but if you still have any questions, you can get in touch with more experienced hackers on the subject, I'm learning how you
I have a channel with some musical arrangements!