The real combat animation of the Great Knight (dismount) has been changed to a more Great one.
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In this hack, the Great Knight (dismount) is treated as a heavy armor class, but until now it did not look like a heavy armor class because it used the image from the Mercenary. I think this change has made it more convincing that they are heavily armored.
Credits
I used the Terror Knight image from the FE4 Patches and Materials. Thank you.