The second game in the Card Fighters series was released in 2001, again for the Neo Geo Pocket Color. However, unlike before, this one was only ever released in Japan. The game is similar to the previous one, but there are now more cards to collect than before and there is only one version of the game.
I haven't got much to say about this as I've barely played it, but check out this place as people have worked hard to create an English language patch for it.