When I first made Marty I showed his design to both my friends Bones on twitter and nextjenn, Bearcow96 named him Marty because I couldn't think of a name for him at the time. While Jenn was creeped out by him because she has a fear of puppets but she also kind of liked him (a love-hate relationship sort of thing). Anyway, she drew her interpretation of him and is the one who made his color scheme (which I now use for him). I still appreciate this piece from Jenn and it is still one of my favorites.

You can find Jenn on instagram and you can find bearcow on Deviantart
https://www.instagram.com/nextjennart/
https://www.deviantart.com/bearcow96