Shamus is a leprechaun that plays a part in the Lost City quest. The player must chop the swamp tree directly west of Father Urhney's house in Lumbridge Swamp, after which he will jump out. When spoken to, he tells the player how to get to Zanaris.
- He refers to the player as an "elephant", despite the fact that elephants are not known to exist in RuneScape.
- Shamus was not graphically updated with the first tool leprechaun update on 25 February 2009. He later received one on 27 May 2009.