Henry and Orville, the Twin Brothers are the sons of Lydia and Neville, the older brothers of Chauncey, and Portrait Ghosts in Luigi's Mansion.
They only appear in Mario's EXTRAS: Stupid Luigi's Mansion. When Luigi enters The Twins' Room, they ask him to play with them. They decided to play tag. Henry and Orville pass through a wall, but Luigi thought it was a fake wall and bumped into it.