Look past the front-of-card pokemon and Palkia is there — 5 times across the TCG, drawn between 2013 and 2019. Naoki Saito, sui and 5ban Graphics's work shows up most often.
These cameos cluster in Cosmic Eclipse most heavily; Naoki Saito accounts for 2 of the appearances.
These cards feature indeterminate, floating, abstract and underwater in their background art, illustrated by artists like Naoki Saito, sui and 5ban Graphics.
Palkia appears as a background cameo across 5 Pokémon cards.
These appearances range from clear sightings to barely-visible silhouettes, scattered across 2013–2019 of the TCG.
Each cameo rewards collectors who pause to look closely at the card art.