Guumon

Guumon is a spoof Digimon.

Etymologies
Name used in Digimon Xros Wars (manga). No official romanization available.
 * Guumon (グーモン)
 * (Ja:) "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 Christopher Aonuma challenges Blastmon to a  contest in order to lure him to a more secluded and less developed area. In setting up the challenge, Christopher develops a fake backstory involving Paamon, Guumon, and Chokimon.