From Bulbapedia, the community-driven Pokémon encyclopedia.
5ban Graphics is an artist who has illustrated several cards for the Pokémon Trading Card Game starting with Black and White, but has also contributed some work to the XY expansions. The artist has designed many Trainer Cards, as well as several Full Art cards and Pokémon cards for the Black and White and XY TCG Series.
An example of 5ban Graphics' work
Little is known about the artist. In 2012, a brief interview about the creation of card artwork was posted on the Creatures, Inc. PTCG blog.
For a list of cards illustrated by 5ban Graphics, go here.
PTCG Blog ポケモンカードができるまで ～イラスト編～ (Japanese, archived)