Spikey (Super Mario Land 2: 6 Golden Coins)

A Spikydillo is an armadillo-like enemy found in the game Super Mario Land 2: Six Golden Coins. It can only be found in the first level of the Tree Zone, near the base of the giant tree. A Spikydillo's attack pattern consists in curling himself up into a ball, then dashing forward to ram Mario. Despite their having spikes, Spikydillos can be defeated by jumping on their heads, or shooting a fireball at them.

Trivia

 * Spikydillo bear a resemblance to the Army, another armadillo ennemy from the Donkey Kong series