Red vs. yellow cheeks on Pikachu cards stems from an intentional design choice by Wizards of the Coast (WotC) for English Base Sets, aiming for anime consistency, but they later reverted to Trivia This card is popularly known as Yellow Cheeks Pikachu as a reference to the card's artwork and to differ it from Pikachu card from the Jungle expansion. This name also appeared Pikachu (Base Set 58) Bulbapedia, the community driven Pokmon encyclopedia Question about Pikachu! General Elite Fourum