Board Thread:Fun and Games/@comment-28914075-20160722183027/@comment-26244866-20170630192232

My theory is that Sans is actually Asgore who made a new secret identity in order to get back together with Toriel.

Proof:
 * Sans and Asgore are both white.
 * Have you ever seen Asgore and Sans in the same place at the same time? Yes... But you also see Sans at 2 places at once at one point in the game.
 * In the genocide route it appears that Sans somehow survives the attack. Asgore still appears after that route.
 * Also, Toriel says "Asgore will kill you." Sans says "You'd be dead where you stand." So Sans would have instantly killed Frisk if it wasn't for the promise with Toriel and Toriel assumes Asgore would have killed Frisk instantly (since she doesn't know Sans and Asgore are the same person).
 * Sans literally means without. And Asgore came up with the identity when he was without Toriel.
 * Sans likes puns and Toriel also likes puns. So Asgore came up with a new identity who likes puns a lot in order to impress Toriel.
 * His new home... I mean newer than new home is located in Snowdin because that's the location that's the closest to the Ruins.
 * So... Sans and Asgore look different... So what? Characters having multiple appearances isn't exactly new to Undertale.