Okakaumeboshi-seijin are an extraterrestrial race.
The Okakaumeboshi-seijin resemble Earthlings though shorter in stature. They apparently have extremely long life spans compared to most humans as Sourman reveals hadn't seen his brother Syoppaman for 320 years before they encounter one another on Earth.
Super Saiyan-like form
Main article: List of Super Saiyan-like occurrences
Sourman possesses the ability to transform into a form identical to the Super Saiyan transformation, though it apparently lacks the latter's immense power as Sourman was crushed when he failed to stop a runaway Ferris wheel while in said form. Due to the spoofing nature of the transformation itself, it is unknown if other Okakaumeboshi are capable of this transformation as well or it was just a gag transformation.