People with the ability to travel between worlds, such as the Nobodies of Kingdom Hearts.

Currently, world hoppers in DDD include:

• All Nobodies and Organization XIII
• Lloyd, Colette, Kratos and Yuan (Using Rheiards)
• Shiro (via blood circles)
• Doctor (via TARDIS)
• Most all Mythological Characters
• Dark (sexforbreakfast), and anybody he gives a feather to
• Daisuke (lolcrayons)
• Shibuya Yuuri (Via Water)
• Ninja turtles: Leonardo Hamato, Mikey, Raph
• Jordan (via teleportation using Avatar powers)
• Gaara (via Body Flicker Technique)
• Darc (taught by Mikey)
• Cinnamon (teleportation from Hunter Base)
• Lezard (makemegodnow)

This is by no means a complete list, please feel free to add your own worldhoppers on.