Only 6 of these were produced. CoroCoro magazine ran a competition for children to design a Pokemon Card. The six winners received one of these superb Holofoil trophy cards.
The card text says:
We certify that your illustration is
an excellent entry in the Pokémon Card
Game Illustration Contest. Therefore,
we state that you are an Officially
Authorized Pokémon Card Illustrator
and admire your skill.