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Bro I was listening to Enigmatic Encounter when I featured this

The song is catchy to me

Just thought it was a cool coincidence

Hmm… Dado likes this! Dado feels very happy now!

Man do I have something to say: what if Deltarune is the actual prequel to Undertale, as explained by these facts.
Sans’ lab has a police badge (possibly Undyne’s police badge from Deltarune), blueprints (they match the blueprints of a machine you build in Deltarune Chapter 1), and a photo album of sans with a bunch of unrecognizable characters. The text also says “Don’t forget.” Which is also the name of the song at the end of Chapter 1!
Maybe Kris is secretly Chara, the result of Gaster’s experimentations with Determination, which leads to another point: Your killing spree “awakened [them] from death, [their] human soul,” Chara says. “Our plan had failed, hadn’t it? Why was I brought back to life?” This implies Chara was part of some unknown plan, and “Deltarune” might be hinting at whose plan it was: Gaster’s.
The mysterious voice in Chapter 1 that made you create that avatar? This could very well be Gaster attempting to create Chara as part of an experiment to see the effects of Determination. This also explains a mysterious red bunker you find hidden in Chapter 1. That’s very likely Gaster’s hiding spot: When you interact with the door, it produces the same sound that Gaster does according to the “Undertale” files. Perhaps Fountains of Darkness are simply experimental playgrounds that Kris/Chara creates in order for Gaster to test the effects of Determination. This would also explain why the player can actually make choices that change the story in Chapter 2.
It’s almost as though Gaster is altering variables, using Chara to see the effects of Determination, bringing player choice slowly back into the series, chapter after chapter.
Of course, this “experiment” involves Kris/Chara creating Fountains of “Darkness,” right? One of Gaster’s journal entries players found in “Undertale” reads: “DARK DARKER YET DARKER. THE DARKNESS KEEPS GROWING. THE SHADOWS CUTTING DEEPER. PHOTON READINGS NEGATIVE. THIS NEXT EXPERIMENT. SEEMS VERY. VERY. INTERESTING.”
If that’s the case, Chara will likely succeed in summoning The Roaring, leaving Lightners to fight the Titans. Not only is “The Roaring actually happens” a plausible final chapter, but but it also perfectly sets up the story of “Undertale.”

Undertale, in a sense, is the ultimate experiment for Determination. We already know how big of a role player choice plays in that game. Additionally, no Darkners exist in “Undertale” because The Roaring turned them all into stone, something Ralsei explains is a consequence of the event.
So at the end of “Deltarune,” perhaps the universe gets destroyed, and the remaining pieces make up the universe of “Undertale.” This would explain why certain character aspects are different (maybe Undyne loses an eye in The Roaring, for example) while other aspects remain the same (Toriel and her ex-husband Asgore are still broken up; Sans and Toriel still have their pun thing; and Alphys is still attracted to Undyne). It would also explain “Gaster Followers”: “Undertale” characters who are grayed out versions of “Deltarune” characters spouting bleak, unexplainable dialogue.

wait if darkners turn into stone how didn't Ralsei do in ch 2

Enough Dark Fountains need to be opened in order for this to happen, as it will cause The Roaring

if lancer can't exist in 2nc chapter dark world why can Ralsei
and wait wheres Lancer at teh end of ch 2

did they just leave him dead there

Idk for sure