Monsters (+Zombies) from different dimensions coming to earth through portals, Luz and King go adventure out to find survivors (Toh), they find Anne, Marcy, and Sasha (Amphibia) (+Sprig, Polly, and hop pop. Anthropomorphic frogs that are only here through portal), then they find Star (princess from a dimension) and Marco, they also find a group of survivors (Quint, Jack, June, and Dirk) living next friendly monsters (last kids on earth), Dipper and Mabel (Gravity falls), and Todd, Esther, and Reggie (Twelve forever)

[You may add other characters from shows if you please]

[There is no zombies where they are because of the special lamps that were set up to repel Zombies]