Dr. FlimFlam's miracle cream

Dr. FlimFlam's Miracle Cream was obtained by Dr. Zoidberg on an interstellar trip from a sleazy travelling salesman who sold him one tube of the mysterious substance for no less than sixty dollars. The lobster doctor gave it to Fry and Leela as a cure for their sore limbs after assembling a super collider, and both of them found out that the substance caused superpowers in humans as a side-effect. Common powers found in humans after the use of the cream are: Apart from the last item (Zoidberg doesn't react to their calls), both Fry and Leela enjoy these superpowers for a limited amount of time, after which they need to reapply the cream to keep them. Together with Bender they form a team of superheroes, The New Justice Team, and do heroic things all across New New York. After they run out of cream though, the superhero team soon falls apart.
 * Super strength
 * Lickity speed
 * Invulnerability
 * Ability to command the loyalty of sea creatures

Trivia

 * The AL1 text on the package reads:
 * "Keep out of reach of children under the age of five hundred. For best results, sacrifice a small mammal xanroc, then apply evenly to interior of eyeball. Would you like to help Dr. FlimFlam Products? Contact a representative at a covered wagon near you."