On the official Undertale wiki layout page guide article, this is stated:
Creation and development
This section contains relevant information pertaining to the article subject's creation and development, outside of the game's narrative: Creation refers to the real-world circumstances that led to the creation, including known design intentions by the author. Development includes any changes the subject underwent pre-release, as well as major changes to the subject post-release. This also includes unused content mentioned in interviews, unused content left in the game files, and coding.
The notable part here is "unused content left in the game files". Essentially, almost every single cut content info bullet point is put in trivia on the wiki. Are those all truly incorrect and should be moved over to a Creation and development section, even if one needs to be created just for that sole bullet point, or no? I know this is what the letter of the rule says, but people consistently don't seem to follow this, so it could be a de facto deprecated rule, for example
What happened was that I recently added the "unused content left in the game files" to the Manual of Style to go along with the Allusions section standardization project to help people organize things better. Unused content is very much part of a subject's development, and Toby and the developers occasionally mention unused content in the newsletters, posts, and social media.
Sans's ice cream scene would have been a Trivia point if it was left over, which wouldn't make sense when it was mentioned in a newsletter. Ralsei and the Knight have unused content for a battle, or ideas, and they would have been out-of-place as a Trivia point too.
Yes, but I mean, do we apply this to all unused content? For example Organikk, it has cut sprites mentioned in trivia, do we make a Creation and development section for them? It's not super clear imo in the phrasing, makes it seem like all cut content goes in creation and development. If this is the intention I can start moving all of those trivia points.
If there's a development reason that we know (or can reasonably speculate based on other leftovers) those were scrapped for it'd fit Creation and development. If we only know these are unused and not much more, maybe it's better to leave them in trivia for now and we can think of where they go later.