|The Mr. Saturn|
A Mr. Saturn as seen at the end of the teaser trailer.
- The Mr. Saturn are from two of the official Mother games (EarthBound and Mother 3) and are sometimes considered the mascots for the series. They are the only known characters in Mother 4 that are from the official games.
- In both the official games, they reside in a village called Saturn Valley and speak in a strange way, visually demonstrated by an unusual font in the game text.
- The Japanese version of the font used by Mr. Saturns is based on Shigesato Itoi's daughter's handwriting when she was a small child.