Tekedon is a recurring character in Genshi Shonen Ryu, it is a small and friendly dinosaur that became a companion to Ryu and his group. Although Tekedon's role is essentially that of a comic relief, it proves to have a remarkable courage.
In the anime, Tekedon was encountered by Ryu and his group during their visit on Salamans Island. It grew attached to Don and was adopted into the group, appearing in all the future episodes afterwards. In the manga, however, Tekedon was saved from the clutches of the lizards, which they were using as bait to capture Ryu and his friends.