One of the least elaborated topics in Undertale lore is the different colored souls, or soul modes, that the player can be transformed into. I've created a theory that explains how specifically these transformations work.
Mad Mew Mew Footage:
https://www.youtube.com/watch?v=h__y5gyJZKw
Ace Attorney Green Screen:
https://youtu.be/ZBj94oKPuVg?si=6GdvmBflWaCse2J1
