Croagunk

Diamond +2: Its cheeks hold poison sacs. It tries to catch foes off guard to jab them with toxic fingers.

Pearl: Inflating its poison sacs, it makes an eerie blubbering sound for intimidation.

Platinum +2: It rarely fights fairly, but that is strictly to ensure survival. It is popular as a mascot.

HeartGold: Fluid squeezed from its finger, albeit poisonous, is a significant ingredient in remedies for lower-back pain.

SoulSilver: Fluid squeezed from its finger, albeit poisonous, is a significant ingredient in remedies for lower back pain.

Black 2 +3: Inflating its poison sacs, it fills the area with an odd sound and hits flinching opponents with a poison jab.

Sword: It makes frightening noises with its poison-filled cheek sacs. When opponents flinch, Croagunk hits them with a poison jab.

Shield: Once diluted, its poison becomes medicinal. This Pokémon came into popularity after a pharmaceutical company chose it as a mascot.

Legends: Arceus: A poison wielder with a dastardly personality. Despite such qualities, this species is afforded a measure of popularity due to its peculiar cry and comical features.