Suneo Honekawa features as a supporting character in "Doraemon the Movie: Nobita's New Dinosaur," embodying his familiar traits within the adventure narrative. He engages in typical boasting and exclusion, primarily targeting Nobita. Early on, Suneo openly mocks Nobita's claims of discovering dinosaur eggs, doubting Nobita's capabilities. He later provokes Nobita by deliberately spilling peanuts in his room, anticipating the ensuing chaos from the twin dinosaurs Kyu and Myu; this confrontation forces the group to travel back in time.

During the Cretaceous period expedition, Suneo displays his characteristic blend of cowardice and pragmatic self-preservation. He frequently urges retreat from dangerous situations, advocating for abandoning risky plans. Despite this reluctance, he participates in pivotal moments, applying his technical aptitude to operate essential equipment like cameras or vehicles when needed. His interactions with the dinosaurs include attempts at control, such as managing the hyperactive Myu after her peanut consumption.

Suneo's relationship with Gian remains unchanged, aligning with him for protection and social advantage, though he occasionally shows subtle defiance. His skills in model assembly and gadget operation aid the group during challenges. The film depicts no significant personal growth or unique development beyond his established role. Suneo primarily acts as a foil to Nobita and provides comic relief through his vanity, exaggerated fears, and occasional cunning. His involvement culminates in the group's collective decision to protect the dinosaurs, cementing his place within the friend group despite his persistent flaws.