Alternate Timeline Madness

After the invasion of the lost drafts is quelled when they were banished back to their respective universes, the dimensional transporters they have, including those to Human Equestria and the AUU are broken and need to be fixed. But when they finally do, they are met with a surprise: War-torn versions of themselves, as they discover that they may need to team up because the multiverse is in imminent danger. These Lodgers come from a UUniverses where villains and heroes were no jokes and traditional cartoon comedy was a myth, and thus this UUniverses were as normal and real as they come, and just recently, their Gazelle had been ruined by something that tricked her into destroying Zootopia and caused her to become a social justice tyrant that is turned away by all except the Lodgers who sacrificed their fame and PR knowing their Gazelle needs help. Though thanks to a dimensional hiccup involving the Lost Drafts Guild, they discover their true enemy: A Mothron from neither one of their UUniverses named Continuus, another pandimensional rogue who is like Zamasu/Black Goku and Injustice Superman combined as he has one goal: create a vast interdimensional army and invade every plain in the multiverse including their own, gaining immortality to ensure he does so, because of the grief of being lost in the multiverse, and will stop at nothing to get what he wants, having the Serious Lodgers' Gazelle act as one of his scapegoats. Thus, Serious Gazelle goes to and chases other universes to try and stop them, including a modern-rebooted Fallout Equestria, a universe where Equestrian ponies and humans live together in both a fantasy and urban society, or their societies are reversed, they return to other already-visited dimensions, meeting new friends and enemies in the process, universes where the Lodgers or other cartoon characters old, new, and original are different in many ways, and thus they must do everything they can to stop Serious Gazelle and Continuus.