Background cameos let illustrators wink at the wider Pokédex. Goomy earns 3 of those moments across 2015–2023, distributed among sowsow, Souichirou Gunjima and Saya Tsuruta and other contributors.
These cameos cluster in Unbroken Bonds most heavily; sowsow accounts for 1 of the appearances.
These cards feature indeterminate, lying_down, neutral and purple in their background art, illustrated by artists like sowsow, Souichirou Gunjima and Saya Tsuruta.
Goomy appears as a background cameo across 3 Pokémon cards.
These appearances range from clear sightings to barely-visible silhouettes, scattered across 2015–2023 of the TCG.
Each cameo rewards collectors who pause to look closely at the card art.