Talking about deformed amiibo... I just checked my BNIB Marth amiibo to make sure it was not a Merth amiibo and I am can happily confirm it is definitely a Marth amiibo.
Marth on the left. Merth on the right.
I wonder if I have a Shuk amiibo or a Shulk amiibo now... hmm...
EDIT #1: Whichever one I have of these two... It is obviously BNIB.