Doomsday

Doomsday is a very powerful enemy of Superman. He has quite a few superpowers, such as super-strength, invulnerability and he can't be killed the same way twice. He is an enemy of the Justice Guardians.

Trivia

 * Doomsday will become Jeffrey's enemy in Jeffrey and Friends' Storm Adventures of Superman: Doomsday.
 * Doomsday will return for revenge in Jeffrey and Friends' Storm Adventures of House of Villains.