Pokémon Battle: Pikachu no Wakuwaku Daibouken by Miho Asada / あさだみほの「ポケモンバトル:ピカチュウのわくわく大ぼうけん」

This is part of a comic series by Miho Asada in Shō-4 (小学一年生), starting in April 2005.