"If my head were any harder, you could use it for a cannon ball."
― Pazu, Castle in the Sky
"It would probably take a bolter shell to crack that thick skull of his."
― Commissar Ciaphas Cain, on Jurgen
"I shall break out of this cell using the hardest substance known to Mankind! MY HEAD!"
― Kremmen of the Star Corps

The power to have an abnormally strong and durable skull. Variation of Unbreakable Bones.

Also Called

  • Hard Head
  • Strong Skull


The user's skull is incredibly durable and strong, enabling for powerful headbutts to no ill effect.




  • User's skull may only be able to endure a certain amount of impact.
  • Enhanced strength and durability may be limited to the skull.
  • User may have a small brain due to the skull being so thick.

Known Users

See Also: Hard Head and Use Your Head.

  • Viltrumites (Image Comics)
  • Arale Norimaki (Dr.Slump)
  • Bonk (Bonk's Adventure)
  • Ushiyama Tatsuma (Golden Kamuy)
  • Vash The Stampede (Trigun)
  • Homer Simpson (The Simpsons)
  • Hammerhead (Marvel Comics)
  • Saiyans (Dragon Ball)
  • Hammerhead (One Punch Man)
  • Yusuke Urameshi (YuYu Hakusho)
  • InuYasha (InuYasha)
  • Rude (Compilation of Final Fantasy VII)
  • Curly (The Three Stooges)
  • Marv Merchants (Home Alone)
  • Fonzie (Happy Days)
  • Mario (Super Mario)
  • Luigi (Super Mario)
  • Scotsman (Samurai Jack)
  • Mega Man X (Mega Man X)
  • Monkey D. Luffy (One Piece)
  • Chinjao (One Piece)
  • Pokémon who can use "Headbutt", "Skull Bash", or "Iron Head" (Pokémon)
  • Crashhopper (Ben 10: Omniverse)
  • Slobber Tooth (Skylanders)
  • Jasper (Steven Universe)
  • Edajima Heihachi (Sakigake Otokojuku)
  • Crashocker (Ben 10: Omniverse)
  • Devil Boner (Channel Awesome)
  • Princess Fiona (Shrek)
  • Queen Lillian (Shrek)
  • Akira Inugami (Wolf Guy)
  • Tabbakumu/Ice Dragons (Combat of Giants)

Known Objects

  • Wushu Helmet (Xiaolin Showdown)