Treecko shows up as a background cameo across 4 Pokémon cards. These appearances span 2003–2004, illustrated by Ken Sugimori, Ken Ikuji and Sumiyoshi Kizuki.
These cameos cluster in Ruby & Sapphire most heavily; Ken Sugimori accounts for 2 of the appearances.
4 cards with Treecko in the background spanning 2003–2004, with art by Ken Sugimori, Ken Ikuji and Sumiyoshi Kizuki.
Treecko appears as a background cameo across 4 Pokémon cards.
These appearances range from clear sightings to barely-visible silhouettes, scattered across 2003–2004 of the TCG.
Each cameo rewards collectors who pause to look closely at the card art.