Rio: Rainbow Gate!

A brisk wind blows one of Yang-Yang's talismans which turns Choco into human form again. Choco decides she wants to earn money so she can buy Mint a camera for her birthday. Though she doesn't have any luck in the casino, she manages to get a reward for returning Howard's wallet to him. Meanwhile, Linda, Mint and Jack stumble across some strange robotic aliens that crash landed on the resort, who shoot a beam that sends Mint and Jack to a strange world based on Linda's dreams. Choco gets help from Ille to buy the camera, though her talisman gets blown off and she reverts to a teddy bear, but Ille manages to deliver the camera to Mint.

Mint Clark goes on holiday with her grandfather to the Howard Resort. While her grandfather enjoys the casino, Mint explores the resort and eventually meets the casino's most famous dealer, Rio Rollins Tachibana. As Rio and Mint go for a walk, they are approached by a man and his henchmen who attempt to take Mint's teddy bear, Choco, but Rio fights them off. After Mint bears witness to the good fortune that Rio brings to her customers in the casino, they are once again approached by the man, Orlin Dunhill, who decides to play a game of closed poker against Rio for Mint's bear. Orlin makes a gamble to get four Queens though, but thanks to Rio's ability to communicate with her cards, he loses out to Rio who wins with a pair of twos. Afterward, Orlin explains he had been collecting rare stuffed animals to fulfill his sorrow from being dumped at the altar, only to then find that Mint's bear isn't a Belgium original.

Rio is asked to train a new recruit named Anya Helsing to be a dealer. Anya is quick to point out that Rio owns a "Gate", one of thirteen rare cards that are wagered in battles with other "Gate Holders" to determine the strongest dealer in the world. Although her dealer skills are quite good, she is rather clumsy, causing some chaos in the casino. Meanwhile, a Gate Holder named Elvis comes to challenge Rio to a Gate Battle set on a giant roulette table. Although Elvis has confidence is his prediction of numbers, he ultimately loses to Rio when a bandage he was wearing on his finger comes off while throwing the ball, allowing Rio to guess correctly and win his gate.

Howard takes Rio to a supposedly haunted castle which used to feature a casino owned by a woman named Misery, with plans to refurbish it as part of the Howard Resort. During the stormy night, lightning strikes the castle, which frees the ghost of Misery, who goes to the Howard Casino and spreads bad luck. She attempts to try and win the casino in a game with Anya, but instead falls victim to her clumsiness and freaks out. Misery later attacks a chicken wing delivery van, and when employees El and Il Adams discover her, they are attacked too. The next night, Rio gets a call from fellow employee Rosa Canyon, who had been possessed by Misery's spirit. Upon returning to the castle, Rio finds Misery, who challenges her to a game for the Howard Resort, having already taken control of El and Il and kidnapped Howard. The game involves betting to see if the dice will land on an odd or even number, but Rio is troubled by Misery's illusions. However, they are dispelled when Misery eats a super-spicy chicken wing she got from a mysterious delivery girl, allowing Rio to win the game and free Rosa. As Rio chases after the delivery girl, she reveals herself as her childhood friend, Rina, who has also been recruited by Howard.