Look past the front-of-card pokemon and indeterminate Pokémon is there — 1 time across the TCG, drawn between 2013 and 2013. Naoki Saito's work shows up most often.
Of the 1 card, XY Black Star Promos contributes the largest cluster. The illustrator most often responsible is Naoki Saito, whose indeterminate Pokémon cameos appear in 1 of these cards.
1 cards with indeterminate Pokémon in the background spanning 2013, with art by Naoki Saito.
indeterminate Pokémon appears as a background cameo across 1 Pokémon card.
These appearances range from clear sightings to barely-visible silhouettes, scattered across 2013 of the TCG.
Each cameo rewards collectors who pause to look closely at the card art.