Croket! Banker Card Game is a Japanese collectible card game published by Konami in June 2003, based on the manga and anime franchise Croket! The source series, written and illustrated by Mamoru Kashimoto, was serialized in Shogakukan's CoroCoro Comic from April 2001 to November 2006 and received the 2003 Shogakukan Manga Award for children's manga. The anime adaptation by OLM ran from April 2003 to March 2005. The world of Croket! centers on characters called Bankers who collect magical coins known as Kinkas. Konami published all Croket! video games as well as this card game, none of which received releases outside Japan. Dedicated documentation of the card game's rules or card pool is scarce in English-language sources.
Source: en.wikipedia.org/wiki/Croket!