Zootopia 2

A week after Judy Hopps and Nick Wilde become partners in the Zootopia Police Department (ZPD), their clashing personalities start to complicate their work. Chief Bogo threatens to separate them unless they resolve their differences. During a raid on a smuggling ring, Judy finds a piece of snake skin, although snakes have not been seen in Zootopia for a century. Undeterred, she suspects that a snake may appear at the Zootennial Gala, an event hosted by Milton Lynxley, whose grandfather Ebenezer founded Zootopia, to celebrate its centennial anniversary.
While infiltrating the Gala with Nick, Judy befriends Pawbert, the youngest son and black sheep of the Lynxley family. Meanwhile, a hooded creature crashes the party and reveals himself as a pit viper. He kidnaps Milton and uses his eye to unlock a digitally locked glass case containing an old journal that documents the creation of the weather walls that regulate Zootopia's climate zones.
Judy corners the viper, who confesses the journal contains evidence to exonerate his family. Seeking to preserve his family's reputation, Milton demands to have the journal burned and the viper killed, but Judy refuses, setting the room ablaze. When ZPD Captain Hoggbottom arrives after the viper accidentally bites Bogo, the Lynxleys frame Judy and Nick for the crime, forcing them to escape with the journal whilst an unknown motorcyclist retrieves the viper. Afterwards, Milton orders former actor and newly elected Mayor Brian Winddancer, whom Milton secretly controls, to retrieve the journal and apprehend Judy, Nick, and the viper.
Now fugitives, Judy and Nick meet Nibbles Maplestick, a conspiracy theorist beaver who leads them to Marsh Market, a secluded area of Zootopia where reptiles hide. There, a basilisk named Jesús explains that the reptiles' original district was buried during the construction of Zootopia's arctic district, Tundratown, which is expected to expand to Marsh Market. The ZPD, led by Hoggbottom, finds Judy and Nick, who narrowly escape, but the viper reappears, retrieves the journal, and escapes through a water tunnel. As they attempt to locate the viper, Judy and Nick climb to reach an abandoned lodge, leading to an argument that ends with their shared carrot pen breaking.
Inside, Judy discovers that reptiles once lived peacefully in Zootopia. The ZPD finds them and arrests Nick, but the viper, who introduces himself as Gary De'Snake, and his motorcyclist partner, revealed to be Pawbert, rescue Judy, explaining that Gary's great-grandmother Agnes was not only the original author of the journal, but also the true founder of Zootopia. Her greedy investor Ebenezer plagiarized her engineering work on the weather walls and later framed her for murdering his tortoise maid, who tried to stop him from burning the original patent. The maid's death subsequently turned the general populace against reptiles, eventually leading to their exile from Zootopia.
Aided by Nibbles, whom the ZPD also arrested, Nick escapes from prison, while accidentally releasing many prisoners, and locates Judy at the Desert-Tundratown weather wall, where she, Gary, and Pawbert activate an old clock tower to find the buried reptile district, deducing that the patent is hidden in Agnes' house. However, Pawbert injects Judy with snake venom, throws Gary out in the snow, and steals the antivenom, revealing he intends to destroy the patent and earn his family's respect and approval. Arriving at the wall, Nick fights Pawbert for the antivenom and manages to throw it to Gary, who cures Judy. After emotionally reconciling with each other, Judy and Nick, accompanied by Gary and Nibbles, follow Pawbert to Lynxley Manor, where they subdue him while Winddancer takes out Milton and his other children. They then find both Agnes' house and the patent, but Pawbert reappears and attempts to destroy it, before being knocked out by Hoggbottom.
With their crimes exposed, the Lynxleys are arrested and Agnes is credited as Zootopia's true founder. Judy and Nick are exonerated, Bogo recovers, the Tundratown expansion to Marsh Market is scrapped and Reptile Ravine is thawed, allowing for reptiles to be fully reintegrated back into Zootopia. Gary reunites with his family, and Nick gifts Judy the newly repaired carrot pen before they begin tracking down the escaped convicts Nick accidentally released earlier, starting with Dawn Bellwether.