I draw a lot of Greymons and these are my favourites.
The horn is a bit wonky but I had a lot of fun playing around with halftone patterns on this one.
I also made one with a Santa hat for the holiday season.
This one's my favourite. I like the colours for Greymon that were used in the initial Digimon Adventure short (the first part of the Digimon Movie [also known as RedGreymon]) so I used those. My greatest achievement with this drawing was modifying it to work as my computer's lockscreen:
