|Location(s)||Poshley Sanctum, Pit of 100 Trials/Underwhere Road, Flipside Pit of 100 Trials|
|Tattle||"That's a Dark Boo. Purple just looks... so wrong. These Boos are SO creepy. Max HP is 8, Attack is 5 and Defense is 0. Its HP and Attack are high, but they're just like ordinary Boos otherwise. So, just attack it like a normal Boo. Get it before it turns invisible!"|
|Catch Card #||093|
Dark Boos are stronger, purple versions of the Boo.
A Dark Boo is a purple Boo located inside the Poshley Sanctum. They are a lot more powerful than the average Boo and guard the 6th Crystal Star. It is unknown if they are intentionally evil Boos or if they're just guarding the star and got the name because of their dark color. Like regular Boos, they attack by scaring and can turn invisible.They are very fond of art, and the sixth Crystal Star is located in a museum of art.
There was originally going to be a giant version of the Dark Boo in the Pit of 100 Trials' Room #50, but it was not used.
In Super Paper Mario, Dark Boos appear right behind Mario and scare him. Many Dark Boos is a hard trial, though flipping to 3-D will end the massacre of scare.
| Species: Boo | Dark Boo | Atomic Boo |
Characters: Lady Bow | Bootler | Peeka | Lahla
They're one of the few enemies that return to a Mario game.