Duplighost

Duplighosts are ghost-like creatures that can take on the appearance, voice and abilities of other people. They were first seen in Paper Mario at the Toad Town Dojo. That was where Lee, a blue-sheeted Duplighost, fought Mario. To attack, Duplighosts can either fly into Mario, or turn into his partner. In partner form, a Duplighost's attacks are weaker, and changing takes up a move, giving Mario a better chance at winning the battle. They mostly appear in Chapter 7 in the Crystal Palace and try to fool Mario often. Because of all the mirrors in the palace, the reflections make it tricky to determine whether a character is the real thing, or a Duplighost.

Another Duplighost appears in Bowser's Keep trying to trick Mario into believing he is Princess Peach. Mario can break the Duplighost's disguise by hammering the fake Princess repeatedly.

Paper Mario: The Thousand-Year Door hints that Duplighosts may actually be a type of demon. Many Twilighters refer to Doopliss, that game's only Duplighost, as a demon haunting the Creepy Steeple.

"Duplighost" is word play on "duplicate", one of their moves.

A Duplighost found in the Crystal Palace on Shiver Mountain in Paper Mario

Notable Duplighosts

 * Doopliss – Paper Mario: The Thousand-Year Door
 * Lee – Paper Mario

Disguised as Goombario:
It's a Duplighost disguised as me. It'll do Headbonk and Tattle. That looks nothing like me. Does it? No! Seriously though, does it? Mario? Hello? Look, I've been working out like crazy trying to get in shape for adventuring. There's just no way I'm that pudgy!

Disguised as Kooper:
It's a Duplighost disguised as Kooper. This impostor almost looks better than the original! Ha! Its disguise is pretty much perfect. Its attack power is exactly the same as the character it's imitating. It's probably not very difficult for this Duplighost to disguise itself as Kooper. After all, our pal is pretty unusual looking. It'll attack us with its shell, just like the regular Kooper. You'll have the best luck beating it if you flip it.

Disguised as Bombette:
It's a Duplighost disguised as Bombette. Its disguise is pretty much perfect. Its attack power is exactly the same as Bombette's. You should be careful even though she looks cute.

Disguised as Parakarry:
It's a Duplighost disguised as Parakarry. He looks even more intelligent as an enemy. Its disguise is pretty much perfect. Its attack power is exactly the same as Parakarry's. Don't underestimate him, Mario. He looks pretty serious.

Disguised as Bow:
It's a Duplighost disguised as Bow. Its disguise is pretty much perfect. Its attack power is exactly the same as Bow's. Look, you've seen her in action. Do you really want to know what a Smack Attack feels like?

Disguised as Watt
It's a Duplighost disguised as Watt. Its disguise is pretty much perfect. Its attack power is exactly the same as the character it's imitating. You know how Watt is shocking? Same goes for this Duplighost.

Disguised as Sushie:
It's a Duplighost disguised as Sushie. Its face looks even grouchier than the real thing! Its disguise is pretty much perfect. Its attack power is exactly the same as Sushie's. I'm glad we have Sushie on our side. She's intimidating! I wonder if this impostor is meddlesome as well...

Disguised as Lakilester:
It's a Duplighost disguised as Lakilester. It's hard to take him seriously. Its disguise is pretty much perfect. Its attack power is exactly the same as Lakilester's. It's tough to dodge his Spiny Flip, so pay attention.