Earlier today Sakurai posted a picture of how the 3DS menu will look in Super Smash Bros. 3DS. He goes on to say that if you played some of his previous works you may recognize the design concept.

62e4384b819dab775ff6ddcc26c577be

To me at least, it looks similar to the Kirby AirRide game (one of my favorite Kirby games but many may disagree) that was made for the GameCube years ago. Especially the Street Pass wifi like design looks similar to an item you would find in City Trial.

Menu_Air_Ride