Digimon Savers: Ultimate Power! Activate Burst Mode!!
Rhythm first appears when the three main Digimon of the series Agumon, Gaomon and Lalamon, are considering what to do now that their partners are held captive. She looks at them for a brief moment and then gets chased by a group of Goblimon and an Ogremon.
After the trio assist and save her, they become friends and she assists them in trying to stop Argomon.
Later on, she also helps Marcus Damon give ShineGreymon power to enter Burst Mode. After Argomon's defeat, she returns to the Digital World with Argomon's Digi-Egg, after promising Agumon that they will meet again.
Throughout the movie, her interactions with Agumon imply a romantic attraction. At the end of the movie, she kisses him, and then says she loves him.