15 Bosses We Underestimated Only to Get Beaten Down Later

Sans – Undertale

Joking around, not taking life too seriously and genuinely enjoying himself – that’s Sans in a nutshell. He can be quite mysterious, teleporting around and meeting the protagonist at different points. However, if you embrace the Genocide Route, Sans will stand to oppose you in the end and throws everything he has from Gaster Blasters to bones. You actually have to wait for him to fall asleep to have a chance at winning.