Bristle

Spiked monsters made of rock. It's got high defense and if Mario is about to attack it with his hammer, he'll get hurt, plus, this monster is impervious to fire.

Sub-Spieces
Dark Bristle

Regular Bristle
HP: 2, Attack: 1, Defense: 4 Tattle: That's a Bristle. ...Totally covered in spikes. They're so prickly! AND they're impervious to fire! Even trying to get close enough to whack it with a hammer is dangerous! Seriously, its spikes will totally pop out! So, since you can't jump on it or use your hammer... you'd better use an item!

Dark Bristle
HP: 8, Attack: 8, Defense: 4 That's a Dark Bristle. It's an ancient creature made of rock. You can't jump on it because of its spikes, and you can't approach due to its spears. AND its Defense is high. You'd better take it out with special attacks or items.