The Superman Madman Hullabaloo#1 1997

This unique variant of The Superman Madman Hullabaloo #1, published by DC Comics in June 1997, features an extraordinary crossover event. Scientific experiments in their respective universes cause Superman and Madman to swap worlds, each also taking on aspects of the other. Superman, with Madman's brain, finds himself in Madman's reality with diminished powers, while Madman, with Superman's brain, navigates Metropolis. This issue is notable for its imaginative premise and the distinctive art and story by Mike Allred.