Collect the designated number of Energy Spheres to unlock Challenge Stages. These stages require Kirby to beat them in a fixed amount of time in order to receive one of four medals based on score requirements.

Challenge	How to unlock
Bomb Challenge	Collect 50 Energy Spheres.
Hi-Jump Challenge	Collect 35 Energy Spheres.
Item Challenge	Collect 120 Energy Spheres.
Sword Challenge	Collect 7 Energy Spheres.
Water Challenge	Collect 70 Energy Spheres.
Whip Challenge	Collect 25 Energy Spheres.
Wing Challenge	Collect 90 Energy Spheres.