Exposure to ancient Atlantean experiments gives Bart Wellins super-powers and Superman can't stop him because exposure to the same experiments have increased his powers so much he daren't use them at all.
Congo Bill; Janu the Jungle Boy; Jim Wilson; Chota the Chimp
Synopsis
Bill and Janu help Jim Wilson produce and distribute an edition of his newspaper "The Jungle Journal" by using the services of Janu's jungle animal friends.