Humanoidverse/CrossMore: Quadruple Trouble Mayhem

 is a crossover animated miniseries event featuring Hasbro's Harmony Unleashed: Equestria Campus Supremacy, and Disney's CrossMore: The Series, both co-developed by Aaron Montalvo.

It is a crossover between the CrossMore universe's Star vs. the Forces of Evil and The Owl House characters, the television series of the same name's characters, a Marvel Comics character and Saban's Power Rangers, which uses the Dino Charge/Dino Supercharge installment (based on Zyuden Sentai Kyoryuger). Two episodes will be from the side of ECS produced by Entertainment One Television, while the following two episodes will be from the side of CrossMore produced by Disney's now-relaunched 20th Television Animation. Both Hasbro and Disney (under eOne and 20th TVA) will co-operate with Hollowfox on all episodes.

The series is directed by Yoshihiro Miyajima (Darling in the Franxx episode director) and Parker Simmons (OK K.O. Let's Be Heroes) at Titmouse and Studio Trigger (marking Disney's second tenure with both studios after Star Wars Visions and Motorcity) and written by Jackie Marchand, Joanna Lewis & Kristine Songco, Nick Cron-DeVico, Todd Casey and Montalvo from a story by the latter. The character concept designers will be fanartist ironghast, mangaka Naoyuki Fujisawa and series' original character designers Kora Kosicka, Dana Terrace and Becky Dreistadt, all of them adapted by Titmouse's Junpei Takayama and Trigger's Yusuke Yoshigaki.

The special is set to be aired in four parts on November 25, 2021. The special is rated TV-MA. This will be the fourth in a four-installment based event specials of crossovers between Disney and Hasbro as similar to Arrowverse's crossover events such as "Crisis on Infinite Earths". The special will be dedicated in loving memory to Brian Goldner, former CEO of Hasbro, who died of cancer on October 12 two days after retiring from Hasbro.

Premise
After the events of Harmony Unleashed: Equestria Campus Alumnus' Ever After Picture Show, Twilight and Applejack's honeymoon plans has taken an adorable stop when President Cadance requested them to take care of Flurry Heart, testing their eventual parenthood. And during their tenure, Pinkie Pie and Rainbow Blitz join in their babysitting efforts with Flurry, while trying to have a successful honeymoon. However, when two witches from another world (Luz and Amity) and a young went to seek a way home, it led to a mindblowing realization when Star and Marco reunite with Twilight and Applejack, who the former two appear with Meteora and Mariposa, of who they befriend with Flurry. And the tenure brings more fuel to the fire when Dinosaurs arrive with the taming of a married Tyler Navarro and Shelby Watkins, who were Power Rangers and got accidentally summoned to another world due to the problems with the Morphin Grid that was taken over by Thrax and his new sister, Bandora Repulsa.