Necrotic® is an outlaw, oftentimes causing trouble down at the HighRoller Molar Saloon. He and Slim® have been known to scuffle, with both taking their lumps along the way.  
His tobacco-chewing and dipping habit has caused Necrotic® significant pain... eating away his gums and causing black, dead skin and tissue in and around his mouth and head.  He hasn't been to Molar Towne® Dental since he was a young teen because he doesn't like to hear the stories of how oral cancer can result from this bad habit. Let's hope that Necrotic® runs in to Wisdom Tooth® soon, and finally wises up and stops using tobacco before his whole head rots completely off!