Mustard

Mustard is a yellow Yoshi with a propeller hat, orange boots, two buttons, and blue eyes and red cheeks. Mustard starts on Night 2 and onwards. He starts in Mustard's Corner, and won't be seen on any cameras until he reaches the left vent. If he appears in the front of the left vent, via the vent light, put on the mask until he goes away. Putting up the camera or not putting on the mask will cause him to get inside and steal the batteries, thus leaving you very vulnerable to Withered Chili.