

Gym Heroes presents a tightly organized 132-card lineup: 91 Pokémon cards, 35 Trainers, and 6 Energy. The rarity spread is broad, with commons and uncommons forming the backbone and a smaller tier of rares and holo rares adding finish. Across the set, the art language stays readable and character-led, favoring simple, focused compositions that keep the subject front and center.
The dominant look is traditional with a strong cartoonish and anime-adjacent edge, carried by bright, vibrant palettes and frequent contrast. Moods skew playful and lighthearted, with occasional calm or mysterious notes. Visual highlights include Blaine's Moltres and Misty's Tentacruel, both showing how the set balances clean staging with energetic color. The illustrator mix is anchored by Ken Sugimori, with additional variety from Atsuko Nishida and Keiji Kinebuchi.
Ken Sugimori provides the majority of the set’s illustrations, establishing a consistent character-design baseline across many cards. Atsuko Nishida and Keiji Kinebuchi contribute a meaningful share of the remaining artwork, adding subtle shifts in line, expression, and staging while staying aligned with the set’s traditional, readable presentation.