Are we allowed to make things after Subeta pets/minions? Say I wanted to make a holdable plush of a pet/minion, would that be allowed? Or a shirt or a pair of pants or minion companion or any number of things?

I am not sure about the minions, but I don't think Subeta pet species can be used. Someone was going to do that prior to the Life Like doll release and staff said no.

I'm even wondering about making shirt prints, or hoodies, or slippers, or bags or accessories or BGs with them or anything non-companion like (for the pets, not the minions)

You might have better luck by a ticket or directly asking / since they approve CWs. I wonder if it would require the 4 changes since I think the pets are copywrited characters.

true, but it's copywritten to Subeta so as it's Subeta's creations it's staying within Subeta XD I've made a ticket though. Thanks :)

"Your item may not be anything that would be put in a collection on Subeta, including but not limited to stickers, plushies, trading cards or beanbags. Likewise, you may not make any collectible item, minion, or book (official or not) an article of custom clothing."

"You may not replicate, duplicate, heavily reference or edit any existing items on site" I assume they mean minions as wel, since it is an item on the site.