A Small Key Hole! (ちいさなカギのドア, Chiisa na Kagi no Doa, lit. Small Key Door) is an event in Tomba!.
Find a small key for the door with the small keyhole.
The event is activated when Tomba tries to access the door with the small keyhole in the Haunted Mansion.
In order to clear the event, Tomba needs to pick up the Small Key that a villager from Baccus Village drops in one of the rooms in the Haunted Mansion. Once the key is in Tomba's possession, open the door to clear the event.