|Family||Muffy Crosswire (imaginer)|
|Cartoon debut||"The Friend Who Wasn't There"|
|Voiced by||Jonathan Wilson|
Waldo is an imaginary elephant who is Muffy's imaginary friend. He was around when Muffy was three, and was rediscovered by finding a picture of him. He is quite small, with an X for his left eye, and white fluff coming out his side. In the dream sequence in "The Friend Who Wasn't There", Muffy thought he stank, and when she woke up, she gave him a bath.He is seen once again in "Muffy Misses Out", this time appearing much more like a physical stuffed animal; it is unclear whether Muffy is imagining a stuffed animal or Waldo is an actual stuffed animal.