There is also the laundry room ghost who haunts the basement laundry room. They are friendly and often leave snacks in the laundry room for all ACME agents. However only a handful have ever seen them.
Really, @Lucy?!?! I could ask that or start asking myself, 'Where in The World is Lee Jordan?' or 'Where in The World are Zack and Ivy?' I mean no one knows where everybody us at.