Hi, thanks.
In this case I only provide the EFKEFC files (Effekseer format, you will need a package to use it in Unity).
The sound effects are owned by RPG Maker when I showcase them in a video, and I do not provide them. (I put the SFX in the videos since most customers are using RPG Maker, so they own the SFX too)
Now about the spritesheet, read the CONTENT section (if you don't see "PNG", there will not be spritesheets, only textures used for the VFX)