Available sources provide no concrete details on Dokin-chan's background, development, or role in *Soreike! Anpanman: Baikinman no Gyakushuu* or other official media like seasons, OVAs, or spin-offs. The movie description lists her among several allies supporting the protagonist and a princess, without elaborating on her specific actions, character arc, or plot significance. General accounts of Dokin-chan's traits, relationships, and equipment from external sources do not cover her portrayal or evolution within this film or the broader franchise narrative. No info.