Blankman (1994)

After his grandmother is killed in a Mafia hit, Darryl (Damon Wayans) fashions a bulletproof overcoat to wear over red long johns, becoming Blankman, a superhero without any superpowers save some inventive tinkering skills. When Blankman's crime-fighting crusade causes a sensation around the city of Metro, Darryl's brother Kevin (David Alan Grier) reluctantly agrees to become Blankman's sidekick, Other Guy, to impress local news anchor Kimberly (Robin Givens), but the mob is fighting back.