|First appearance||Paper Mario: The Thousand-Year Door|
|Location(s)||Pit of 100 Trials|
|Attack method||Breathing Fire, stomping and biting|
|Spoils||One Star Point|
Bonetail is a large skeletal dragon and optional boss enemy from Paper Mario: The Thousand-Year Door.
Bonetail is an ancient dragon who has been reduced to a skeletal state from age, and was a pet of the Shadow Queen, indicating that Bonetail's age exceeds 1,000. Despite owning Bonetail as a pet, the Shadow Queen possesses only 75% of the dragon's stamina. Bonetail has the ability to breathe flame that causes various status ailments depending on it's color (i.e. orange fire leaves a burn, blue freezes party members), the Dragon has equal attack and defense statistics as his younger, living brother, Gloomtail, and shows the ability to regenerate health, doing so, when it approaches close to zero.