A cheating dummy for repelling deer and similar animals from forbidden site is invented. In addition to cheating ability, the dummy also equipped with sensor for detecting approaching animals and capable of triggering actions such as spreading water toward approaching animals, generating ultra-sound to scare them and even making a gunshot sound to repel them. By combining cheating and scaring functions, the repelling effect is expected to be much better than those devices using only sprinkling water or ultra-sound repelling alone. The cheating dummy is user decoratable by dressing with customized outfits for decoration or increasing cheating ability.