|Nom de guerre||Starman Jr.|
|Description||He is small, but it is obvious that he is a spaceman.|
- "It's been a long time, Buzz Buzz. You've been successful at foiling Master Giygas' plans. But... Buzz Buzz, you must now surrender. You're no longer a hero, but just a useless insect. I'll stomp you hard!"
- — Starman Junior (EarthBound)
- "Strong against heat
Strong against cold
Strong against thunder
It may be small but it's clearly an alien"
- — In-battle check
Starman Jr. is the second boss in the game, and is the cause of the animals in the Podunk Zoo going wild and attacking people. It is found within a giant capsule floating in the middle of the zoo superintendent's office. Starman Junior utilizes very strong physical attacks and a variety of PK Beam attacks, although its PK Beam γ will be reflected back at it if Ninten has the Franklin Badge. After the Starman Junior is defeated, it flies away in the capsule, returning the animals back to normal.
Starman Junior is revealed to have followed Buzz Buzz, a mysterious survivor of an enslaved Earth ten years in the future, back to Ness's time, and a battle ensues, after which Starman Junior falls. Despite Starman Junior's arsenal of PSI attacks, Buzz Buzz's repeated usage of PSI Shield Σ will neutralize any attempts to harm Ness and co. The Starman Junior can be defeated by Picky Minch in EarthBound if it only has one or two Hit Points left when Picky attacks. It can also only be lost to if Ness manages to use Shield during the battle (learned at level 12), which will override Buzz Buzz's PSI Shields and only weaken physical damage to himself. There is an unused sprite in EarthBound that strongly resembles the capsule the Starman Jr. escaped in after it's defeat in Mother 1. Starman Junior's last line of dialogue "I'll stomp you hard!" is used by one of the Pigmasks during their invasion of Saturn Valley in Mother 3.