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Dull Bones are enemies found in Hooktail Castle in Paper Mario: The Thousand-Year Door. They are a weaker version of Dry Bones and, as their name implies they are duller in color. They also wear green shoes. Dull Bones attack by throwing bones at Mario and his partners. Despite having very low HP, their defense power makes them slightly harder to defeat. Using a POW Block is very efficient against this enemy. Unlike Dry Bones, they can't reassemble once they're smashed. However, Dull Bones can construct other Dull Bones to help in the fight. Three of them appear in the Glitz Pit called the Dead Bones. They were also in the Riddle Tower as the weakest Dry Bones-esque enemy. They lastly appeared in the Pit of 100 Trials.
Dull Bones and Dark Dull Bones also appear in Super Paper Mario. The former can be found in The Underwhere, Castle Bleck and in the Flipside Pit of 100 Trials. They were very weak against Bowser's Fire Breath. Oddly enough, they're much stronger in this game than they were in the second Paper Mario title.
One of Dry Bones alternate color schemes in Mario Superstar Baseball resembles a Dull Bones, possessing darker coloration and green shoes. Also a bunch of Dull Bones make a cameo appearance in the Nintendo Monopoly board game.
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