Rare Orb

Rare Orbs are important collectible items that appear in the game, Donkey Kong Country Returns. They are all simultaneously held in a secret level in each of the first eight worlds, which have to be unlocked by collecting the hidden K-O-N-G Letters in the other levels.

In other to get the Rare Orb, the Kongs must get past all of the obstacles and enemies in the secret level. Once all eight orbs are collected, they will be able to unlock the entrance to the Golden Temple and play it.

Trivia

 * The name "Rare Orbs" may be a throwback to Rare.