The little monster beast (ィンプモン/impmon) is a fictional creature in the cross-platform product "Digital Tyrannosaurus" series developed by Bandai Co., Ltd. in Japan, which first appeared in the advanced package 9 of the card game "The Colosseum", the glory of the white sword. 1 The protagonist in the cartoon Digital Animal Trainer is kind in nature. Because of loneliness, helplessness and strong desire, he often harassed Terriermon and made fun of their dependence on human beings. Later, he went astray, sold his soul and evolved into a hell beast.