Big, mean, and scary the Yellow Puff Monster does its best to take out anything that is not its kind. They should be approached with extreme caution and can only be taken down by those who have been thoroughly trained. There have been reports that humans have come across a few of them which are friendly, but most are not. Despite their large mouths, they do not eat anything they kill. They only eat trees and bugs. Sometimes, the yellow coats from their bodies are made into fur coats.