Chuumon in shy and easily sensitive about his stature, and appearance. Chuumon always changes his attitude whenever Sofia's around and makes him feel good about his self. Chuumon often hangs around Cinderella, Jaq & Gus when he's taking a break from missions.
Sukamon and Chuumon were complaining up in tree, about not ever having partners in the future. When they saw a camp, they also saw a group of kids with Digimon. After they were spotted by a girl, and a boy, they felt attached to the two humans after they showed kindness of real tamers. Once when everyone woke up after the night, Sukamon and Chuumon tried to prove themselves to be good enough as partners for either of the kids. When Heartless and Nobodies appeared, Sukamon and Chuumon wanted to help, but instead the two hid from the battle. When it was down to Sora, Sofia, Mushroomon, and Lalamon against Myotismon, Sukamon and Chuumon bought the group time by using themselves as bait. But when Sukamon and Chuumon were almost done for, Sora and Sofia's Digivices began to react to the two and Digivolved them to Garbagemon and Salamandermon and finally made Myotismon to retreat. After their victory, Sukamon and Chuumon De-Digivolved from Garbagemon, and Salamandermon, and were told by Sofia and Sora that they knew Sukamon and Chuumon Digivolved because their Digivices chose the two digimon as their partners. With happiness, they accepted their destiny.