Mario Movie 2. The Koopalings and Bowser Jr. show up and kidnap Peach, as well as rescuing Bowser from his bottle, and they hold her hostage at Isle Delfino. Mario and Luigi missed this big setpiece because they were out exploring with Toad and discovering the recently hatched capital Y Yoshi and when they get back they find the kingdom in ruins. Peach's assistant Toadsworth gives them some exposition about what happened and they decide to rescue her, but they need help. And they can't get it from the Kongs, they're dealing with their own Reptile Problem wink wink. But now that you mention it, they do remember that Peach had plans to visit a far off kingdom called Sarasaland that she had heard about but never visited before and establish diplomatic relations there. Maybe they can help. They go there, meet Daisy, Luigi is dumbstruck with love (boo hoo to the people who ship him with Bowser for some reason), and she agrees to help them if they can get rid of a pest who has been turning her citizens into bricks and grasses. King Wart! In a small diversion equal in length to the Ring of Kong segment, they work together and beat up Wart (and Yoshi falls in love with his minion Birdo in the process, Mario notices this and facepalms because two of his companions have met a girl and become ga-ga with love in the same trip) and they all set off to Isle Delfino to save Peach. We've been having small seens at the Isle this whole time showing Peach navigating this hostage crisis and trying to escape, but also just showing Bowser being a good dad with his kids at an ammusement park. The group shows up, Bowser Jr. uses his paintbrush to make Petey Piranha happen as well as many Shadow Marios, and the Koopas flee with Peach to the top of the Volcano. They fight, they fight, fight and fight and fight! fight fight fight fight fight fight! The Mario and Bowser Show! sorry. The climactic showdown at the top of the volcano happens with the entire team working together to take down all the Koopa Kids and Fury Bowser (thanks to his sons paint), as a thematic callback to their flawed (yet still successful) fight with Wart earlier and they win and it's happy! Bowser and his kids are sent blasting off again, though Peach has some newfound empathy for the big guy after seeing him with his kids, and they all go back to the mushroom kingdom. A post-credit sceen shows that all is not sunshine back in brooklyn however! Two shady characters have been impersonating Mario and Luigi! And we end on the iconic laughs of the Wario Bros.