Cuphead bosses, by DarkRuler
I didn't see any of these characters here, so I thought I'd post them all at once. (If they have been posted and I just missed them, feel free to delete). They're not perfect, but they're so much better than the other Cuphead characters I've found floating about (most of which only have one form and barely any attacks).
Goopy LeGrande
Ribby & Croaks
Grim Matchstick
Dr. Kahl's Robot
The Root Pack
Videos on Light Ruler's YouTube Channel
Original topics:
http://mugenguild.com/forum/topics/2017-12-21-updated-goopy-le-grandecuphead-181973.0.html
http://mugenguild.com/forum/topics/2017-12-21-updated-ribby-and-croakscuphead-182077.0.html
http://mugenguild.com/forum/topics/updated-grim-matchstickcuphead-182355.0.html
http://mugenguild.com/forum/topics/updated-dr-kahls-robotcuphead-182485.0.html
http://mugenguild.com/forum/topics/the-root-packcuphead-183578.msg2403882.html Edit: updated Grim Matchstick's link, 2/11/2018
Edit: added Root Pack link, 4/30/2018