The Pokémon TCG hides Greninja in the background art of 1 card. The cameos sit across 2016, with Mitsuhiro Arita responsible for several of them.
These cameos cluster in BREAKpoint most heavily; Mitsuhiro Arita accounts for 1 of the appearances.
These cards feature emerging, water, red color and open mouth in their background art, illustrated by artists like Mitsuhiro Arita.
Greninja appears as a background cameo across 1 Pokémon card.
These appearances range from clear sightings to barely-visible silhouettes, scattered across 2016 of the TCG.
Each cameo rewards collectors who pause to look closely at the card art.