From the Super Mario Wiki
about to hammer a Toothy
Toothies are Pokeys made entirely out of teeth that are found in Mario & Luigi: Bowser's Inside Story. These enemies are encountered in Plack Beach. They attack by charging at the player. If they have no body, they summon a Blue Virus with a spear in their mouth and have it charge at the player. Toothies can also rebuild their bodies. Dealing damage to their bodies does not cause damage, however dealing damage to the head will. With one Hammer swing or Bowser's punch, the player can wipe out the entire body, leaving the head stuck in the ground. The head is the only part of the Toothy to which damage can be dealt. If Bowser inhales the teeth that make up Toothy's body, he can increase his defense and also make the Toothy vulnerable, as it can no longer rebuild its body. Bowser's flame will not do any damage or take out a Toothy's body. They appear very similar to Mario & Luigi: Partners in Time's Skellokey.
Names in other languages
|From Sanbo, Pokey's Japanese name, and 「歯」ha, meaning tooth.
||From "Tri" (Prefix for three) and "Muela" (tooth).
||From "Pokey" and "quenotte" (tooth)
||From "dente" (tooth) and "Marghibruco" (Pokey's Italian name)