Board Thread:General Discussion/@comment-36624593-20181205013841/@comment-37345491-20190411011033

Toby said it is an AU that has no effect on the plot of Undertale. If it was a prequel then why does it take place in a modern world instead of long ago like the plot says so? If it was a sequel then how does Undyne have both her eyes, and how is Asriel still alive? No matter what you say, Deltarune is a completely different universe and you can't prove otherwise. Not when Toby himself said it is an AU.