Need FGC Input-- fight stick business-- need permission to use/sell my own capcom character fan-art?


I’m interested in starting a little arcade stick business locally, and I’d like to find out if I need any permission to use my own artwork of Capcom characters. Does anybody know?
When I went to the Final Round tournament in Atlanta, GA, there was a guy who was making 8bit necklaces of various characters and said he was licensed by Capcom.
Can someone tell me if I need the same kind of permission to be able sell a custom print that I make of Capcom characters? Or do they only care if you reuse their drawings specifically?