(There are eight origins for the MANCM in Generation 1. All of them include the Great Eight...)
Ethan: Somebody who, if allowed to write about himself, would likely go on an endless mildly egoistic rant.
Matt: Titanus lore blurb/dump: Titanus is/was an absolute monarchy when Matt appeared. Not born into the royal family, or any member of Titanus. Appeared. He was taken in due to his demonstration of his immense mastery of his powers. On Titanus, there was socialism, but there were still social classes. Most notably, there was a divide between the normal class and the "generics". One day, Matt witnessed his "parents", the ruling matriarchs of the royal family, banish a group of Normals who had given some of their money (notably not tax money) to the generics (a group forced to have generic names). Matt felt bad and gave some of his birthday tax money to a poor family of Generics. (Ben and Sally) However, his actions were witnessed by a servant, who notified the royal family, driving them crazy with anger and immediately banishing Matt to the cosmos in an escape pod, where he ended up on Earth.
"Meanwhile, Amos weeps/despairs once more, eventually mustering the strength to rebuild his world and repopulate it by taking some humans from Titanus who were expelled, the very ones who inspired Matt to be a rebel in the first place. He names this world Orthanos III, making a guidebook for those who wish to travel to this newly created paradise. Amos is soon discovered by the MANCM due to his fame. He joins them as the CEO/manager of the Galactic Vacationing franchise, leading/protecting the planet..."
Ben and Sally would remember Matt's favor and meet him again before they passed. Ethan would induct many of their descendants into the MANCM. In their name, he and Matt later (quite forcibly) annexed Titanus, took it over (Matt even threw the servant into jail for life), put a big company factory there (Salamander and Iguana Company) and forced a transition to becoming something more like a democracy or republic, all the while modernizing and being enviro-clean. (???) Ethan thought himself quite a "Conquering Napoleonus".
Ayan: Last to come into the multiversal server of the first six in this list.
Yash: Helped train the Turtle of Power after finding it. Once worked under Lucifer, and then the King of the Demons.
Hank: Hunted down many different four-legged species, strangely ignores toddlers.
Joe: Trained a certain famous reptile after being stranded there. Once a janitor.
Remy: Secretly made his own universe somewhere
Vincent: Copied Remy, was found by Ethan, helped give the other members their own universes
Also - "Was chilling in his house one day until Ethan randomly decided to abduct him so he can join the MANCM. His brother Anthony is obviously very concerned for him and somewhat hates Ethan."