Bramball

Bramballs are a type of enemy introduced in New Super Mario Bros. Wii and returns in New Super Mario Bros. U.

New Super Mario Bros. Wii
They appear as orange spherical Pokey-esque enemies with brambles for arms jutting out of their sides and yellow suction cup-like feet. Their sole attack is moving around a set path by flipping themselves around and planting their feet on flat surfaces. Their feet are similar to that of Plungelos, and in the beta version of the game, Bramballs have brown feet instead of yellow. When they reach the end of a small piece of land or wall, they will flip the other way and continue moving. Touching a Bramball's feet or arms will hurt the player.

Bramballs can be defeated by jumping on the ball in the center, freezing them as Ice Mario or Penguin Mario and Ground Pounding on them while frozen, being hit by Fire Mario's fireballs and a Star. Hitting them from underneath will release coins and cause them to temporarily stop flipping over. Hitting them while launching out of a Warp Pipe cannon instantly defeats one and causes them to release twenty coins.

New Super Mario Bros. U
Brambles are set to return in the upcoming title, New Super Mario Bros. U, being the enemies of the titular Bramball Woods.

Trivia

 * Bramball's name is a play on the words "bramble" (of which its long appendages are made out of) and "ball".