Guardian was one of the first clones created by Proffesor Miles Warren, the Jackal, from DNA of Peter Parker. He guarded the Jackal's mountain laboratory with the help of his 'brother', Jack. The Guardian defeated the Scarlet Spider in a short battle. When Spider-Man arrived and Scarlet Spider woke up, they were attacked by him, but he died to clone degeneration.
Guardian's cellular degeneration caused his skin density to increase 100 fold. He is capable of lifting 10 tons. He heals from injury about 5 times quicker than Peter.