Flip a pancake motion on Game Boy Color Kirby jumps Koro Koro Kirby or Kirby Tilt 'n' Tumble

Koro Koro Kirby for the Game Boy Color was released in 2000. It is also known as Kirby Tilt 'n' Tumble and is the only Kirby game to be released on the Game Boy Color. The cartridge’s unique shape is due to the built-in accelerometer which lets you control Kirby by tilting the Game Boy Color in the direction you want Kirby to go