These neighboring babies are the butt of a joke by presiding doctors, who rave over Broly's power level but criticize his reaction to Kakarot's crying, while also criticizing Kakarot's then-measly power level of 2 while also stating that though he has a low power level, he has the spirit of a Saiyan. In the Saiyan delivery room where he rests afterward, Broly is grieved by the constant disruption of his literal 'crybaby' neighbor, Kakarot (later rechristened Goku). This anomaly meant that by birth, Broly's power had already been close to that of Bardock and King Vegeta at the time of their deaths (which coincidentally happens during the afternoon of Broly's birth).

At birth, his most curious feature was his inordinate power level of 10,000. Broly was born in Age 737, during the period of intense turmoil between Friezaand the Saiyans.