I made this in Stickmin Creator. I am pretty proud of it.

Here are the main sprites so far

Overworld Sprites

I have created the first sprite. Here's Boopkins(Alphys). This is my first sprite so it may not look that good. I will try to make a better one for the full game.

Parchment Sprite 1

I got the main sprites for Sans done

Another Sprite. This time Luigi(Toriel).

I finally finished Purgatory's overworld sprites

I finished the Battle Sprites

Her AU name is officially Murder!Red. Also, here's the sprite sheet.