Gatchmon is Haru Shinkai's Buddy Appmon.
He have white fur, yellow eyes, a tail, a small horn on the nose, and small fangs. He has metallic feet with three toes each and a large claw on each toe, and metallic hands with three clawed fingers each.
He has a magnifying glass-like appendage on his tail, and a yellow looking glass mark on his belly.
He wears a red helmet with two horns forming a "V"-like shape, and a magnifying glass-like object on the helmet, the latter of which references its search abilities.
He likes to look cool and his search function allows him to learn many things, including other people's secrets and the weak point of his enemies.