Dusuke is an owl who watches over Tomy-T and Eggy-P's orchard. He first appeared in episode 165 - Tomy-T and Eggy-P! He also seems to be fond of Marron, as Hamtaro's imitating her voice encouraging Dusuke kept him from falling asleep in episode 255 - Smell Strongly, Marron!
His Italian name is Gugufo.