Croagunk recurs throughout the anime *Pocket Monsters: Diamond & Pearl*, primarily linked to Brock. It displays distinct personality traits and combat behaviors. Possessing a dastardly nature, Croagunk nonetheless gained significant popularity due to its peculiar cry and comical appearance. It frequently employs underhanded battle tactics, favoring survival over fair play. This includes inflating its poison-filled cheek sacs to produce intimidating blubbering sounds, causing opponents to flinch before striking with Poison Jab attacks. Its fighting style draws from real-world influences, such as the Wolverine Frog's bone-protrusion mechanism, aligning with its signature Poison Jab move. A notable behavior involves Croagunk's interventions to halt Brock's flirtatious advances. It uses Poison Jab to stop Brock from pursuing romantic interests, serving as a recurring comedic element and reinforcing its role as a peacemaker within the group. Physically, Croagunk often adopts a delinquent-like squat posture, reflecting design inspiration from Japanese *banchō* (delinquent) archetypes, including visual elements like the sarashi (bandage-wrap pattern) on its abdomen. Beyond combat, Croagunk's poison has dual applications. While the fluid squeezed from its fingers is highly toxic, diluted forms serve as key ingredients in medicinal remedies for ailments like lower-back pain. This paradoxical nature fits its portrayal as a mascot for pharmaceutical companies in the Pokémon world. In spin-off media, Croagunk maintains a visible presence. It operates a shop in the *Pokémon Mystery Dungeon: Explorers* series and appears as a playable fighter in *Pokkén Tournament DX*. In the latter game, its Synergy Burst Attack involves piling explosive balloons onto opponents, highlighting its mischievous and mascot-like traits. Information regarding its origin story, evolution into Toxicroak, or specific character development arcs across seasons, movies, or OVAs remains unavailable.