Is Undertale Sans from Deltarune's World?

Is Sans from Undertale the same Sans as in Deltarune? This Deltarune theory has been floating around since 2018, and today I discuss its evidence, its holes

Games like Undertale that subvert and surprise

Sans CONNECTS Deltarune to Undertale! (Deltarune Theories)

How Sans' Appearance in Deltarune Opens Connections to Undertale

Spamality - Metal Designs by Draculabyte – draculabyte

Post-Ch2 Deltarune Theories / GioCities

More evidence that sans is from the world of Deltarune! : r/Undertale

Still got that sweater. — SANS IS FROM. DELTARUNE

Dark World Muffet/Sans by killb94 on DeviantArt

My Size Sans by robynred on DeviantArt

What do you feel is the most interesting character in Undertale that's not a major character (The Dreemurr family, Undyne and Alphys, the Skeleton Bros., etc.)? - Quora

Sans, Deltarune Wiki

Killing him in the genocide run only freed him from his world. . . . #sans #sansundertale #undertale #deltarune #amongus #supersmashbros…

Stream DELTARUNE - WISDOM OF THE WORLD (Undertale x Mother Remix) by RetroSpecter

EVERYTHING EXPLAINED!! How Delta Rune IS Related To Undertale's Timeline