Phineas and Ferb The Movie: Candace Against the Universe (2020) – Candace, once again, suffers another day of trying and failing to bust her genius brothers Phineas and Ferb. As she airs her grievances to Vanessa, a space pod comes out of nowhere and sucks them up. Phineas and Ferb witness this and, identifying the license plate on it, learn that it is from the planet Feebla-Oot and recruit Isabella, Baljeet and Buford to build a portal to the planet. However, the portal redirects them to Doofenshmirtz Evil Inc. where Dr Doofenshmirtz was also trying to build a portal upon seeing that Vanessa was kidnapped. Anticipating that the portals would not work, Doofenshmirtz has built a spaceship for himself and the gang to travel to Feebla-Oot, with Perry the Platypus secretly following them.
Candace and Vanessa explore the space ship they have been taken to and locate the escape pods. While Vanessa escapes, Candace is captured; however, both end up on Feebla-Oot anyway. Candace is taken to the leader, the oddly named Super Super Big Doctor who sympathizes with Candace’s plight. She too has two younger brothers that she was tired of and decided to come to Feebla-Oot to rule it. Big Doctor informs Candace that she contains “Remarkalonium” which is important for their people, thus making Candace feel special. Upon arriving at Feebla-Oot, Phineas and Ferb try to patch things up with Candace by giving her a gift they made, but she rejects them and Big Doctor has them taken away.
The gang is actually being imprisoned, which is what Big Doctor had done to her brothers, but Perry rescues them. Candace learns that the “Remarkalonium” is actually just carbon dioxide which is what a spore plant named Mama needs so that Big Doctor can control her subjects. Candace accidentally reveals that the people of Earth exhale carbon dioxide and Big Doctor plots to conquer Earth. Phineas, Ferb and the gang team up with the oppressed Cowards, the previous inhabitants, and attack the alien city. Big Doctor and her army flee to Earth. The gang follow her, but Doofenshmirtz stays behind when he learns that Vanessa is still on Feebla-Oot.