Bokomon serves as a knowledgeable guide during the Digimon Frontier movie's events, wielding the Monoshiri Book—a repository of Digital World lore—to interpret ancient inscriptions and murals. When protagonists land on a conflict-torn floating island divided between human-type and beast-type Digimon factions, he deciphers a fragmented mural depicting Ornismon, initially perceived as a benevolent guardian deity. His scholarly expertise proves vital in analyzing the incomplete text, with early interpretations hinting at peace.

As hostilities intensify, Bokomon stays alongside younger Digimon and human companions in a subgroup dedicated to reconstructing the damaged mural. He persistently aids in reassembling scattered fragments, culminating in the full inscription’s restoration. His translation unveils a critical truth: Ornismon was an ancient oppressor defeated by Legendary Warriors, not a protector. This discovery exposes the island’s crisis and the primary antagonist Murmuxmon’s scheme to resurrect Ornismon.

Throughout the climactic battle, Bokomon offers contextual insights without engaging in combat, emphasizing historical exposition and collaborative problem-solving. His contributions help confront the island’s true legend, leading to restored peace. Following the conflict’s resolution, his involvement concludes within the film’s narrative scope.