Apparently the IP Team AKA the Character Supervisors are responsible for limiting the Mario Characters in Nintendo’s products only being almost completely absent from Super Mario Odyssey which says a lot about how bad it would have been if they were fully supervising the Game.
These guys are infact are likely why Miyamoto apparently requested Tanabe limit the characters he put in Sticker Star since Miyamoto outright mentions how the IP Team limits even him!
Miyamoto most assuredly doesn’t want Tanabe wasting efforts on anything that would get turned down by the Character Supervisors and went straight to suggesting Tanabe limit Characters!
Judging from interviews describing Miyamoto making such limitations shows him making such requests in a sad manner which considering the Character Supervisors is understandable.
Someone on the Forums should join either IGN or GameStop’s Journalists and arrange an interview with the Character Supervisors and interrogate them concerning the lack of Kammy Koopa, the Toad Minister, Shaman(seen in Super Mario RPG and the Paper Mario Games), Sarasaland and the Toads with hair in the Paper Mario series.
They should also get confirmation that Miyamoto made his requests on behalf of the Character Supervisors.
If they are to blame for Kammy Koopa, Shaman, Sarasaland and the unique Toads(from the Paper Mario Games and SMRPG) not appearing in recent games then making their involvement public in a video interview on IGN or GameStop will cause a PR Backlash that would force the Character Supervisors to drop limitations or(if they are incompetent) force the requested characters to appear regardless of making sense.