Weekenders Adventures of Grossology is the another Weekenders TV show crossover planned to be made by Sonic876 and RatiganRules. It is unknown when it will be made.
Tino Tonitini, Bloom, Ash Ketchum, Littlefoot, SpongeBob, and their friends meet Ty and Abby, a teen brother and sister crime-fighting team who report to the Bureau of Grossology, a secret government facility whose job is to protect the city from disgusting villains and their gross crimes. Each episode of the series follows the pair on adventures based on real scientific facts. Aided by their friend Lab Rat (a human scientist) and their boss The Director, Ty and Abby work to keep the city safe, all while keeping their identities hidden.
- Bloom, Stella, Flora, Musa, Tecna, Layla, Roxy, Ash Ketchum, Pikachu, Misty, Brock, Togepi, Littlefoot, Cera, Ducky, Petrie, Spike, Mickey Mouse, Donald Duck, Goofy, Simba, Timon, Pumbaa, SpongeBob SquarePants, Patrick Star, Aladdin, Princess Jasmine, Genie, Abu, Iago, Charlie Brown, Linus Van Pelt, Lucy Van Pelt, Sally Brown, Schroeder, Peppermint Patty, Marcie, Violet Gray, Patty, Pig-Pen, Snoopy, Woodstock, Creepie Creecher, Gnat, Pauly, Budge Bentley, Chris-Alice Hollyruller, Scooby-Doo, Shaggy Rogers, Fred Jones, Daphne Blake, Velma Dinkley, Salior Moon and the Salior Scouts, The Bowser Family, the Joker, Harley Quinn, Two-Face, the Penguin, the Fearsome Five, Ratigan, Fidget, Jafar, Maleficent, Myotismon, Ursula, Hades, Dr. Facilier, Kurumi Tokisaki, Percival C. McLeach, The Dazzlings, Tirek, Cruella De Vil, the Grand Duke of Owls, Team Rocket, Dr. Blowhole, and the Trix (Icy, Darcy, and Stormy).