Spider-Ham is an alternate reality counterpart to Spider-Man.
Flight of the Iron Spider
Iron Man shows Spider-Man a machine that could scatter any physical object's particles inside across parallel universes. Spider-Man briefly envisions himself being turned into Spider-Ham as a result. 
Run Pig Run
Loki disguises himself as a hot dog vendor in order to give Spider-Man an enchanted hot dog that turns him into Spider-Ham as payback for Spider-Man ruining his plans. Just then, Asgard's finest hunters led by Executioner arrive and chase after Spider-Man as part of Asgardsreia. Thor comes to Spider-Ham's aid and guesses that Loki had did this to him. While running, Thor tells Spider-Ham that he must keep him alive until the hunt ends at sundown. Thor throws Spider-Ham and his hammer towards Midtown High School. Thor brings Spider-Ham to Phil Coulson, Power Man, Iron Fist, White Tiger, and Nova just as Executioner and the other hunters arrive. Spider-Ham even tries to reason with Executioner that he is not a real pig. Phil Coulson arrives where he and Thor hold off the hunters while the others get Spider-Ham out of there. While on the S.H.I.E.L.D. Helicarrier, Nick Fury helps to protect Spider-Ham when the wolves that the hunters ride on sprout wings and attack the S.H.I.E.L.D. Helicarrier. While Thor, Phil Coulson, and Spider-Ham's team fight Executioner and the hunters, Spider-Ham ends up calling out Loki and fights him. Not wanting his friends to sacrifice themselves for him, Spider-Ham fights Executioner. Before Executioner can land the killing blow on Spider-Ham, the sun sets ending the hunt. Spider-Ham changes back to Spider-Man and punches Loki.
Spider-VerseAn alternate version of Spider-Man, Peter Porker got his powers from a spider that fell into Aunt May's pancake batter that transferred the vitamins and powers to him, becoming Spider-Ham. He uses his powers for good and even joins with the Avengers, but decides to quit after J. Jonah Jackal turns the public against him.
He encounters Spider-Man (whom he mistook for a monkey) while relaxing by his mud pool. With encouragement from Spider-Man, he decides to become Spider-Ham once again and helps fight the Green Goblin. Although the Goblin still manages to get DNA from his chin, Spider-Ham is offered a spot on the Avengers team again which he accepts.
c - cameo
Background in other media
- He's the second spider who's dimension has it's own special physical design, the first one being Spider-Man 2099.