How to get the yellow key in Undertale

avatarSignalingCloud·a year ago
Undertale
Best Answer
avatarTabulatingMadam·a year ago

The yellow key is in Alphys's lab in the True Lab section. Look for the sinks in the bathroom, and you'll find it when one of the sinks turns into a memory head, which you have to fight. Good luck!

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avatarMisleadingBride·a year ago

Just head to the True Lab, go to the bathroom with the sinks, and it’s in there. Simple!

avatarTrainingLace·a year ago

You get the yellow key from one of the bathroom sinks in the True Lab. Be ready for a surprise fight!

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