I am glad you were able to find a suitable font on the internet!
As for the battle background, yes, the background is supposed to be black. I don't know if you know this, but I was influenced by the early Final Fantasy III-like battle screens from the NES era.
Here is a brief description of the plug-ins.
FC_DontTrim, FC_AjustTerrain...Please refer to the "Battle backgrounds" section in the accompanying "Detailed guide_En.html" for an explanation.
FC_AboutLowerBody...If you want to hide the lower body in bushes, you can set how many pixels from the bottom the hidden area should be and how opaque it should be.
FC_AjustFont...You can set various settings for font display.
FC_NoBattleLog...Hides the battle log displayed at the top of the screen in the battle screen.
FC_SVCharaPosition...Allows you to set the display position of the SV character.
FC_WindowOpacity (MV only)...Allows you to set the window opacity.
That's all.
If you have any other questions, please let me know.
Translated with www.DeepL.com/Translator (free version)