ALTERNATE VERSIONS
In the Age of Apocalypse, Blob was first seen as a test subject for the Dark Beast, who sought to enhance his powers. Although he was seemingly killed by Cyclops during a rampage in the lab, Blob returned years later serving under Weapon Omega and his Black Legion. He killed Nightcrawler’s human wife, earning him the German swordsman’s eternal hatred. After an encounter with Earth-616’s X-Force, he journeyed back to their reality to assist Dark Beast and the ascendant Archangel. Nightcrawler traveled after him and joined the local X-Force, while Dukes joined the latest Brotherhood of Evil Mutants in turn. Wagner ended up betraying his own allies in X-Force for the opportunity to kill Blob. He teleported a blood-frenzied shark into Dukes’ guts, which tore apart the impenetrable brute’s insides for the kill.
In the Ultimate universe, Franklin Dukes worked in a carnival side show before joining Magneto and the Brotherhood of Mutants. Blob was a core member of the Brotherhood and remained with the group even after Magneto’s apparent death, despite Quicksilver’s less than impressive new leadership. Blob was getting his jollies fooling Hank McCoy of the X-Men by pretending to be a supermodel named Naomi on an e-dating site. Beast let it slip that Magneto was alive and living as a human under amnesia, thanks to Xavier’s telepathy. The Brotherhood returned to their roots 
and abandoned Pietro and Wanda to rescue Magneto and resume mutant terrorism. Still, it was Wanda’s death that drove Magneto over the brink, as he triggered the Ultimatum wave that nearly consumed New York. Blob was among the most depraved members of the Brotherhood who remained loyal, and he turned to cannibalism when he murdered Wasp of the Ultimates. Her ex-husband Hank Pym furiously picked Blob up in his giant form and bit his head off.
Ultimate Blob left a legacy in the form of his children. Liz Allan, a classmate of Peter Parker’s, turned out to be a mutant and briefly joined the X-Men as that reality’s Firestar. She was the daughter of Franklin Dukes, and her mother inherited a large estate after Blob’s death. The stipulation was the Allans would also adopt Franklin’s other child, Teddy. After the X-Men disbanded, Liz and Teddy tried to attend normal high school, but their powers were revealed during a school shooting incident. Firestar joined Karen Grant and Jimmy Hudson in a S.H.I.E.L.D. sponsored team of runaways, but Teddy linked up with Quicksilver and Mystique to become the new Blob of the Brotherhood.
In the House of M, Fred Dukes was incarcerated at a mutant containment center when Magneto and his Brotherhood allies freed the camp. Magneto personally encouraged Fred’s choice of a mutant name as the Blob. Fred fought alongside the Brotherhood for the conquest of Genosha 
and later the surrender of the United States. He was later part of Thunderbird’s Brotherhood, an FBI strike force in mutant-controlled America targeting Sapien Town crimes in New York. Unfortunately, their unit received a public defeat at the hands of Luke Cage and his Avengers. In modern times, he served on a clandestine ops squad known as the Marauders under Callisto’s command.
In an oddly Blob-centric reality from X-Men: Millennial Visions, Blob quit the Brotherhood and 
became famous on the Super Sumo Federation before retiring as the undefeated champion. Back in the States, Fred Dukes accepted a role providing protection to a high-profile client when he ran into Mystique, now operating as an independent assassin. She chose to abandon her mission and the two of them teamed up as villains-for-hire, selling muscle and murder… and perhaps, love?
In the Planet X timeline, the Apocalypse Twins initiated a rapture of all the mutants on Earth before allowing the planet to be destroyed by the Celestial Executioner. The mutant race relocated to Planet X in the six years that followed. Blob was still Decimated at the time, but was known for using MGH, which may account for his presence in the rapture. He confirmed his X-Gene reignited on Planet X. Blob served with Magneto’s X-Force keeping the peace among the mutant people and opposing the last remaining Avengers who fought to restore the human race.
In Cable & Deadpool, Wade visited a world conquered by Apocalypse where Blob ironically served as the Horseman of Famine, alongside Cable, Archangel, and Spider-Man.
Not much is known about the Blob of Earth-811 save that his Brotherhood succeeded in the assassination of Senator Kelly. Years after, he was seen with Magneto’s Brotherhood when they attempted to assume custody of the world’s nuclear arsenal in light of the Mutant Control Act. In a variant of that timeline seen on Battleworld, Kelly survived and enacted the Mutant Control Act 
himself. Blob and Mystique were captured and experimented on for fifteen years until members of Kelly’s cabinet released them. They were sent after Kate Pryde’s escaping X-Men to create propaganda of mutant-on-mutant violence to enflame the voters. Blob was horribly scarred from the experiments, and was killed by Kate’s teenaged son, Cameron.
The Blob is a mainstay among the Brotherhood, and his prominent silhouette means he’s often seen among the team in various timelines. He served with Sabretooth’s Brotherhood during Days of Future Now, joined Magneto alongside odder choices like Mist Mistress and Crucible in the Spider-Man: Renew Your Vows timeline, and was part of Cyclops’ eclectic Brotherhood roster in T.J. Wagner’s home reality, borrowed from X-Men: Millennial Visions. In one alternate future, he fought alongside Magneto’s Brotherhood against the Reaver virus, and he was a member of Raze’s Brotherhood culled from many realities in X-Men: No More Humans.