Golem

Golems are rock-like creatures native to the Mirror World and also appear to be minions of King Golem. They first appeared in Kirby & the Amazing Mirror as a common enemy. Golems come in 3 colors which each give Kirby a different ability. They are most commonly seen in a reddish brown color, which gives Stone When eaten. The grayish blue is just as common and gives Fighter, and yellow, the rarest of the three, gives Wheel when eaten. Kirby needs to super inhale them in order to get them into his mouth.

A Golem trophy also appears in Super Smash Bros. Brawl. It will later be both an enemy and Helper in the upcoming Kirby Wii.

Kirby and the Amazing Mirror
Golems are usually found dormant. But when Kirby passes by them or gets close, they wake up and try to attack him. The regular red Golems (Stone ability) attack by jumping in the air and then attempt to fall on Kirby and crush him. The pale yellow Golems (Wheel ability) will roll into Kirby, an attack which can be easily dodged given they're not falling from an incline. The blue Golems (Fighter ability) are perhaps the hardest to defeat, and will attack by throwing quick-paced uppercuts at Kirby.

King Golem is the ruler of the Golems and is fought as the first boss in the game.

Kirby Wii
Golems can be seen in various pre-release screenshots of the game, but not much is known about their appearance in this game. However it is apparent that Golem will be the Helper for the Stone ability in this working title. It is unknown however if Golem will provide different abilities like it did in Kirby & the Amazing Mirror.

However it is evident from the trailer that they still provide Stone, as seen when Kirby generates one by giving up his Stone ability.

In addition, Golems seem to use their model from its Trophy in Super Smash Bros. Brawl.

Etymology
Golems originate from ancient Jewish folklore. They are large creatures made from stone and clay that are brought to life to carry out deeds for its creator/owner.

Trivia

 * Golems are one of only two enemies that can give an ability based on their coloration. They share this trait with Dygclops from Kirby's Adventure.