Koffing shows up as a background cameo across 6 Pokémon cards. These appearances span 2000–2019, illustrated by Ken Sugimori, Shigenori Negishi and Ryo Ueda.
These cameos cluster in Team Rocket most heavily; Ken Sugimori accounts for 2 of the appearances.
These cards feature indoor, indeterminate, speakers and standing in their background art, illustrated by artists like Ken Sugimori, Shigenori Negishi and Ryo Ueda.
Koffing appears as a background cameo across 6 Pokémon cards.
These appearances range from clear sightings to barely-visible silhouettes, scattered across 2000–2019 of the TCG.
Each cameo rewards collectors who pause to look closely at the card art.