Another one for "Sunset of Seven Suns" motif.
One month ago, I theorized about "Shop 3" being a variation of Pink's leitmotif (https://undertale.wiki/d/t/pink-and-shop-3/6999/7), but with time, I can't stop thinking it actually sounds like "Sunset of Seven Suns".
The second part of Shop 3 has the "Six Flowers" motif. Check this discussion for further information: https://undertale.wiki/d/t/possible-six-flowers-leitmotif-in-shop-3/8105/2
The first part, on the other hand, sounds like "Sunset of Seven Suns": 0:05-0:09, 0:15-0:20. Here is a sheet for comparison (0:05-0:09):
This one also applies to kris_piano_shop.
The motif is also present in Cutie Mew Mew Magic at these timestamps: 1:49-1:51, 1:55-1:57, 1:59-2:02 (1:49-1:55):
This last one also applies to snd_pink_stretch_2_troubled and snd_pink_stretch_2_fixed.
Edit: After check, it doesn't sound at all like "Sunset of Seven Suns", but both themes above still sound like each other. Possibly a "Pink" part 3 motif or the great comeback of the "Shop 3" motif.