Nick can also do activities like fishing and bug catching. They all have their individual requests, which mostly can lead to minigames such as boxing or golf. The player's task is to control Nick or his alter-ego in order to enjoy the island life with the other islanders and to help them. The hero gets support from bunny-like beings called Mimin, the dominant species of Mimin Island. Only with the help of a chosen hero, Nick, or rather Captain Rainbow in this case, the wishes can be granted.
During their conversations, he learns that no one's wish has actually been granted so far. On Mimin Island, Nick meets various Nintendo characters who also came there because of their own dreams and wishes. It doesn't take much time to get the belt back. Since this special item is essential for him, Nick starts exploring the island. Then he sees the belt being carried away by bunny-like creatures who have obtained it. After a short moment of confusion, Nick spots that his belt is missing.
When Nick regains consciousness, he has been washed up at the beach of Mimin Island. The superhero loses his belt, which is needed for the transformation, and so Captain Rainbow turns back to the ordinary Nick. In order to save this being, Nick transforms into Captain Rainbow and jumps into the water. During his journey, he notices a bunny-like creature desperately paddling in the water. In a dark night, Nick ventures to the island by raft. In order to restore his lost popularity, Nick decides to venture to Mimin Island, an island where wishes are said to come true. However, the show isn't popular anymore, because another superhero attracts the interest of the audience.
His alter-ego Captain Rainbow is a yo-yo-wielding superhero who stars in his own TV show. Nick comes from Mameruca, "The Land of the Free".
The game was only released in Japan and Taiwan. Notably, many secondary Nintendo characters also appear in the game including but not limited to Birdo from the Mario series, the playable character from the NES video game Golf, and Hikari from the Japanese exclusive video game Shin Onigashima. After his ratings have gone down for his television show, he heads to an island that grants wishes, though he will come across more than that - he will be required to transform into his alter ego and battle enemies and so forth. The game stars Nick, a character who can transform into superhero Captain Rainbow. Captain Rainbow (Japanese: キャプテン★レインボー Kyaputen★ Reinbō) is a Wii video game that was published by Nintendo and developed by Skip (the creators of Chibi-Robo! on the Nintendo GameCube).