Kirby's Wave Ride is a Mini-game from Kirby & the Amazing Mirror.
Game
In Kirby's Wave Ride, the four Kirbys are Warpstar racing on the ocean. By pressing A, Kirby jumps and by jumping from the tip of a wave, Kirby gains speed. Depending on how well timed the jump is, the words good, great or excellent will appear on screen, with excellent giving you the most speed. The first Kirby to cross the finish line wins.
This game appears to pay tribute to Kirby's Air Grind which appeared in Kirby: Nightmare in Dream Land.