I don't know how to name this gallery anymore but I got these arts from an BBW-Chan thread: https://bbw-chan.link/bbwdraw/res/307585.html

I don't know the original sources for these images but I'm still uploading these here so they'll not lost. All these arts were made by ketchup.

Oh, I can help with that!

So, these sprites are both technically made for mods of the game Super Mario Bros. Remastered (which is a fan remake of Super Mario Bros for NES with mod support)
Those Rosalina sprites are indeed made by the artist Ketchup (@ketchupmustard.bsky.social)
However! They were merely Inspired by the Vivian sprites, which were made by DoubleCap (@doublecappro.bsky.social; developer and artist of the game Fat Fleet) for a mod made by someoneyouknow9097!

So! My suggestion would be to name it something like "Super Mario Bros. Remastered WG Mod Sprites" (perhaps giving credit to the artists and mod dev in parentheses like I did) so that it's more accurate to the actual contents of the gallery!
(I understand this was a rush job for the sake of preservation, and I respect it! But that's why I went through the effort of tracking all this down; so that it can be preserved in an accurate state!)

Base +6, BTL11 +2