Guumon

Guumon is a spoof Digimon whose name and design is derived from the "Guu" (グー) gesture in, which equivalent to the "Rock" gesture in the western.

Digimon Xros Wars (manga)
When attacks the Human World, he causes immense damage in the urban setting, so Kiriha Aonuma challenges Blastmon to a  contest in order to lure him to a more secluded and less developed area. In setting up the challenge, Kiriha develops a fake backstory involving Paamon, Guumon, and Chokimon.