Can i edit the default magic animations using this new tool?
No, unfortunately Can not do that.
FE's default magic animations is hard-coded from the program.
Therefore, basically it can not be changed.
To add magic animation like a battle animation, a extends magic system patch was created.
There is a magic system created by FEitorAdv and a magic system of CSACreator.
You can change the magic implemented by these two with this animation tool.
Although I said at the beginning that FE's magic animation was hard-coded by the program,
However, in some magic, frame data exists fragmentarily.
In FEbuilderGBA, We can edit it as "Magical animation in ROM".
This data exists around the ROM, and the format is not unified.
I analyzed the program of FE8J and FE8U and asked for a pointer manually.
There are many unknown parts in this data.
There will be things that will not work if you change it.
It is a stage of testing what will happen if we change this data.
What I know now is.
A.Animation frame data exists. Palette animation without frame data also exists.
B.Data has been created with compressed TSA.
C.The height of the image is not unified.
D.Sometimes it is palette animation, having multiple palettes, having only a single palette.
E.Sound effect data is another program code, it is hard-coded, it is impossible to use it like battle animation.
F.This function is related. FE8J:08056158 FE8U:080551B0
If you are interested in analyzing the FE's program code, please share the results.
In the future, animation creation tools will allow you to make some changes.
However, due to the structure of the FE program, I think that it can not be used like battle animation.