Iggy Koopa represents Kappn', an anthropomorphic turtle-like character with a green color scheme who operates a motorboat.
The stage represents the shores of the islands in the Animal Crossing series where Kapp'n will keep his boat docked at the pier.
The music track represents the sea shanties that Kapp'n sings while operating his ferry in the Animal Crossing series.
The Heavy Wind hazard and the Buoyancy Reduced rule reference Kapp'n's ferry services in the Animal Crossing series where Kapp'n will transport the player to different islands by boat.
The Buoyancy Reduced rule reference how the player cannot swim in Animal Crossing, which first features Kapp'n as a special character.
Other trivia:
This spirit's Support type references Kapp'n's role in the Animal Crossing series by ferrying the player to other islands.
This spirit's Grab type references Kapp'n's green color scheme.
