Here is what I did recently.
Using the Unity Project, I highlighted the model, and I clicked GameObject -> Export to FBX.
I used these settings, and I clicked Export.
I first exported the ASCII FBX format, and when I imported the ASCII FBX format in Blender, it did not work.
Using Export to FBX, I exported the Binary FBX format.
I had to import the Binary FBX format in Blender.
After I did that, it came out like this.
FBX animation file in Blender.
Archive File Size: 968,596 Bytes
Password: 3#thQ\bWSkq;cz]x
https://jumpshare.com/v/Te0m7PnPcpNUGBVQeOOZ
I want to view the Pokemon (Pocket Monsters) 3DS-or-Switch animations in BrawlBox or BrawlCrate. Also, I got some information from soopercool101 from GitHub, and that user stated that I need to convert the .anim Unity file to the .anim Blender-or-Maya file with either Blender or Maya.
Now, I use Blender (v2.91) and Windows 10 (64-bit) (v10.0.19041.1052).