The different types of doors
These doors appear in both games and also have event connected to them, one for each game; Smile! and The Laughing Door. In order to open these doors, Tomba must change his status ailment to laughing.
Door with a keyhole
Two doors with either a big or a large keyhole can be found in the Haunted Mansion of the first game. Both doors can be found at the north side of the mansion. The A Small Key Hole! and A Large Key Hole! events are connected to these doors.