Background cameos let illustrators wink at the wider Pokédex. Deoxys earns 3 of those moments across 2010–2019, distributed among Shinji Higuchi + Sachiko Eba, Mitsuhiro Arita and Hasuno and other contributors.
These cameos cluster in HS—Undaunted most heavily; Shinji Higuchi + Sachiko Eba accounts for 1 of the appearances.
These cards feature abstract, floating, indeterminate and duo in their background art, illustrated by artists like Shinji Higuchi + Sachiko Eba, Mitsuhiro Arita and Hasuno.
Deoxys appears as a background cameo across 3 Pokémon cards.
These appearances range from clear sightings to barely-visible silhouettes, scattered across 2010–2019 of the TCG.
Each cameo rewards collectors who pause to look closely at the card art.