Puddinghead, or Keith, is one of the Cannonballs. He stands around the unlit campfire with Cannonballhead and Fishmaskhead. Jellyhead-head is nearby the group.
The message in a bottle to locate this castaway was last visible 4 days ago on 8 February. It will be visible again in 2 days on 14 February. (wrong?) Once a message in a bottle is found and when a player has walked near its spawn location when it was visible it will always be visible, unless the message in the bottle or its treasure map is in the player's bank or inventory.
He is wearing the Christmas pudding head override.