The 'Kero Kero' of the title comes from the onomatopoeia for the sound a frog makes. But no wonder the frog is squawking as it gets hammered around the course in a game of croquet with frogs instead of balls. Various conditions to consider too like in golf such as the wind direction or the fact that the ball is a frog and will jump off spiders webs or launch at passing flies. Allows players to enjoy their own characters in versus mode too.

In Ribbit King you play as a boy named Scooter. The king of your home planet informs you that they are running out of super ribbonite and ask you to bring back more. The king's assistants send you off to win first place in a frolf tournament in order to save your planet and win a new supply of Super Ribbonite.