Chuckorok

Chuckoroks are a species of round, rock-like monsters seen only in Mario & Luigi: Superstar Saga.

Mario and Luigi encounter Chuckoroks during their return to Chucklehuck Woods in search of the Beanstar Pieces. Entering a small area inhabited solely by the Winkles, they are eventually forced to enter Winkle Colosseum to receive the Beanstar piece. They play the Chuckola Bounce minigame in the Colosseum, which pits them against the Chuckoroks.

Chuckoroks move in tandem around the arena in a circular motion, and spit Chuckola Rocks at Mario and Luigi; these rocks stun the brothers on contact. Hitting the Chuckola Rocks with the Chuckola Board turns them blue and sends them back towards the Chuckoroks. If a Chuckola Rock hits a Chuckorok, it is defeated, and one point is added to the brothers' score. If a brother touches a Barrier Mushroom, a Chuckola Rock that hits him will automatically defeat the Chuckorok that sent it.

Chuckoroks that are defeated will be replaced after a while. After defeating a certain number of Chuckoroks, they will begin to be replaced by smaller ones that are harder to hit.

Chuckoroks reappear in Mario & Luigi: Superstar Saga + Bowser's Minions with an identical purpose. However, the 'X's on top of their heads are replaced by a giant swirl. Their eyes are completely black, but turn red when they spit Chuckola Rocks or Barrier Mushrooms. They are also rendered as 3D models rather than a 2D sprite.

Trivia

 * Chuckoroks seem to be based off of Octoroks from The Legend of Zelda series, as both shoot rocks and have similar names. The method used to damage Chuckoroks is also similar to the way Link defeats Octoroks in The Legend of Zelda: Ocarina of Time: by reflecting the enemy's projectile back at it.