Paper Mario: Origami King Interview with Development Team : r/NintendoSwitch

Paper Mario Producer Says Team Is No Longer Able To Graphically Represent Individual Characteristics In Toad NPCs

That Tanabe interview about how it's no longer possible to modify Mario characters applying to non-Paper Mario games.

Super Paper Mario - Retro Reflections ~ Chalgyr's Game Room

List of Mario role-playing games - Wikipedia

Paper Mario: The Origami King - Wikipedia

Paper Mario: The Origami King Preview - A New Crease On Life – Nintendo Shares Insight On Paper Mario's Latest Adventure - Game Informer

Paper Mario - Wikipedia

Nintendo Switch - Super Mario Wiki, the Mario encyclopedia

Paper Mario: The Thousand-Year Door - The Cutting Room Floor

Paper Mario The Origami King - A Completionist's Unexpected Nightmare