I wanna say they used the chibi-style art that's cut off on the very top right of your photo. If I remember correctly each different face value was a certain character and the color and surrounding decoration depended on card suit. It has been like 15 years though so my memory is fuzzy.
was gonna say i may have it but it's actually this.
i use to buy random merch on yahoo auctions and i wonder if i have the cards somewhere.
i can look but i don't have a scanner.
I like that.
(rename to .rar and extract)
The suit colors can be a bit confusing at first though.