Dry Bones is a character in Boo Party 8.
Dry Bones is a stupid idiot. From using Blowaway candy in DK's Treetop Temple, therefore helping the opponets get to the star, to doing nothing in 2V2 minigames, Dry Bones never does anything helpful to himself.
Dry Bones was invited to the Star Carnival because he claimed he is the long dead founder of Koopa's Tycoon Town. (Spoilers he's not)