Undertale Yellow's Genocide Route has an INSANE ENDING, and getting there is PURE AGONY. But even moreso it has IMPOSSIBLE Hard boss fights that are Harder than Sans! This video is a full playthrough of the genocide run including all the boss fights and the ending! Can I defeat the ultimate boss fight in Undertale Yellow, Zenith Martlet? Who knows! Let's find out!

Undertale Yellow but I take nothing seriously Undertale Yellow is an incredible Undertale Fangame that just had it's full release! It acts as a prequel to the Undertale story, and you play as the wielder of the soul of Justice, Clover! But in this playthrough, there is a twist; I'm playing.
And even though I'm a huge fan of Undertale and Deltarune, you already know I'm incapable of taking anything completely seriously! So settle down and get ready for this new series!
If you enjoyed the video, be sure to like it, so I know to continue the series, and yo, while you're at it, comment and subscribe too! @mazeraylux

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