Since I've had to look into it recently, I've got something minor to add.
Spoiler: Color modding: (click to see content)
Also, you can use Debug VDP1 to get the x/y position to whatever sprites are listed. The values are displayed as decimal though.
If you're feeling lucky, you could even poke around the x/y position addresses and see if you can find anything to modify/rescale sprites (I've had to do this for 2 games because I couldn't color mod the black BG, and it's less codes you have to add).