While sharing fan art for free is considered grey-area fair use by many, selling a PDF containing trademarked characters is illegal. Most reputable creators in the expansion space use Original Characters (OCs) . If you are creating a PDF to enter the market, do not use Mario or Goku. Create "Marko the Plumber" and "Gokai the Saiyan."
The Digital Evolution of Fan Art: Exploring the "Expansion-Fan-Comics.pdf" Phenomenon Expansion-Fan-Comics.pdf
The "Expansion-Fan-Comics.pdf" keyword highlights a preference for the Portable Document Format over standard image galleries on sites like DeviantArt or Pixiv. This preference stems from several factors: While sharing fan art for free is considered