Bristle
The Bristle are spiked monsters made of rock. They have high defense, and if Mario trys to attack one with his hammer, he'll end up hurting himself. Plus, this monster is impervious to fire.
Sub-Spieces
Dark Bristle
Paper Mario 2 Stats
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.