Stone Spike

Stone Spikes are a sub-species of Spikes that appear in New Super Mario Bros. Wii. They are blue in color and have green hair. They act like normal Spikes, but are found on top of mountains and peaks and throw spikeballs made out of rock. They are found in some stages from World 6 and in the World 8-4. They can be defeated just like the normal Spikes; by jumping on its head, by throwing a fireball at it or by freezing them using an Ice Flower or a Penguin Suit.

Trivia

 * Most likely by coincidence, their color scheme resembles both Tubba Blubba's, and Grubba's.
 * Most likely a coincidence, Spikes in this game have blue hair and green skin, which, as stated above, is just the colors swapped.