Notes for Possible Future Undertale Theories

I'd like to note some things that may be important for the future.

1. Sans' famous lines before he attacks you are quite similar to the Wolf's in Grimm's version of Little Red Riding Hood. Asgore also says Sans' famous lines. (Undertale)

2. In a playing card deck, there are sometimes two Jokers. There are no Knights in a normal deck. Jevil of course represents a Joker and a possibility is that the Knight may be some form of Joker. (Deltarune)

3. Ralsei blushes whenever Kris gets too close to him. (Deltarune)

4. Apparently there is something called a "Dirty Hacker Ending". Since I only heard about this from another person, I am unsure whether it is true or not. If it is true and canonical, that would mean Sans is able to see, restore and mess with game files. (Undertale)

These are just some notes.