Supremo
From superman.nu: Supermanica
The super-powered hero who is secretly Allan Vale, a Smallville student.
Courtesy of a formula developed by his Uncle Jake, Supremo uses his "superstrength and invulnerability" to assist Superboy in several heroic feats before tragically succumbing to "the incurable disease he caught in Hong Kong" (SB No.132, Sep 1966: "The Youth Who was Braver than Superboy!").
