Jeff Andonuts (ジェフ・アンドーナッツ, Jefu Andōnattsu) is a character appearing in EarthBound, as one of Ness's friends and a party member. He is the only playable character in EarthBound to lack PSI power (making up for that with all those machines he's built).
Jeff appears as a trophy in SSBM.
"Another of Ness's friends in EarthBound, Jeff is the only son of the famous scientist, Dr. Andonuts. Jeff is a mechanical genius, able to turn common, broken tools into complex weapons like the Hungry HP-sucker and the Slime Generator. He's a bit on the shy side but incredibly intelligent and brave in the heat of battle."
Game: Earthbound (06/95)
In Brawl, he appears as an Assist Trophy, and he uses an invention of his called the Multi-Bottle Rocket 5. Once he sets it up and nervously takes cover, it launches four mini-rockets and one mega-rocket which home in on the nearest opponent. The number of times he does this is dependant on whether his summoner is behind or leading in a match. E.G. He will only do it once if the Summoner is in the lead and thrice (three times) if the summoner is in last place.
Dr. Andonuts's son, who attends a boarding school in Winters. He receives a telepathic message from Paula saying that she and Ness have been captured, and he sets out to rescue them. He's Ness's age but has the knowledge of an established scientist. He repairs broken items and makes them into other things. As his IQ increases, so does the number of things he can create.
- Earthbound (1995)