Rio: Rainbow Gate!

Japanese Title: リオ レインボーゲート！

Rio Rainbow Gate is an anime writen by Mayori Sekijima, produced by Shinji Horikiri, and directed by Takao Kato. This background of this story is an gambling casino place with pachinko, poker, playing card, lucky wheel, and all sort of gambling games. First aired on January 4, 2011 and March 29, 2011.

Plot
In a Island Casino, there's a hotel called Howard Resort, the place to grab your luck and money with the goddess of victory, Rio Rollins. Rio is a dealer and worker in Howard Resort who can bring a luck to anyone near her or being helped by her. One day, a new worker called Anya Helsing visit Rio's room and find a card called Gates. Gates is a special card who is can acquired by Gates battle and the people who have a Gates called Gates Holder. Rio friend Mint and Rina is support her for winning more and more battle. Rio have to fight with Cartia and her pals or if she lost, Howard Resort will go to Cartia hand!