Mario and Luigi: Superstar SagaEdit
Prior to the events of Mario & Luigi: Superstar Saga, Peach was notified by the Beanbean Kingdom that the witch Cackletta would come and try to steal her voice. Cackletta wanted to do this in order to waken the Beanstar, a star-shaped bean which would grant wishes to everyone. The Beanstar has been sleeping and could only be wakened by a pure voice, in order to prevent abuse. Peach took precautions and when Cackletta and Fawful, dressed as ambassadors, arrived at her castle, they were not greeted by Peach, but by Birdo, who was disguised as the princess. Cackletta and Fawful unknowingly stole Birdo's voice and escaped from the castle, leaving Birdo with a voice of exploding characters. However, Mario, Luigi and Bowser, who were not aware of the true identity of the "princess", followed Cackletta to the Beanbean Kingdom before the real Peach was able to intervene.
After Mario and Luigi had presumably killed Cackletta at the Woohoo Hooniversity, Peach went to the Beanbean Kingdom with her plane. Peach revealed Birdo's disguise, thanked Mario and Luigi for taking care of the Cackletta problem, and decided to spend the holidays in the Beanbean Kingdom. She expressed the wish to travel to Little Fungitown, a settlement of Toad emigrants, which was lying across the dangerous Teehee Valley. Toadsworth insisted that Mario and Luigi accompany the princess on this journey. During their venture through Teehee Valley, Peach had to be protected from any harm in the desert. When she disappeared from Mario and Luigi's view, Gritty Goombas would appear instantly and take her to an underground dungeon. At the valley's end, Peach ran into Trunkle, a giant rock monster, but Mario and Luigi saved her from it before it was too late.
Later, Bowletta kidnapped Peach in order to make sure to awaken the Beanstar this time, which had shown angry reactions when confronted with Birdo's voice. She took Peach, who was at the Mushroom Kingdom embassy of Little Fungitown at the time, using Bowser's Koopa Clown Car. However, Cackletta was no longer in the possession of the Beanstar itself. When Mario and Luigi met Bowletta in Joke's End, Luigi dressed himself up in Peach's spare dress to fool Bowletta and Fawful into thinking he was Peach. The plan worked, and Bowletta released the real Peach, and kidnapped Luigi instead. In the meantime, Mario received a kiss from Peach. After Luigi's escape from the repaired Koopa Cruiser, Peach stayed in the Little Fungitown embassy until Bowletta was defeated.
Mario and Luigi: Partners in TimeEditMario & Luigi: Partners in Time starts with a flashback to the past. At the time the story starts, Toadsworth the Younger always took care of the baby princess, since she cried a lot. Baby Mario and Baby Luigi would sometimes come to play with her. And even Baby Bowser still came to kidnap her. But one day, aliens known as Shroobs invaded the Mushroom Kingdom. And since Baby Mario, Baby Luigi, Baby Bowser, Baby Peach and Young Toadsworth were all there, Baby Bowser called Kamek to get them out of the castle. Kamek arrived and took them out of the castle with the Koopa Cruiser just in time.
In the present, Peach, Toadiko and Toadbert had used the Time Machine of Professor E. Gadd to travel back to the past, unaware of traveling to the time where the Shroobs were attacking. When they got to the past, the Shroobs cornered Peach and the Toads. Elder Princess Shroob, the leader of the Shroobs, and Princess Shroob, her younger sister, attacked Peach. Peach grabbed the time machine's power supply, the Cobalt Star, and trapped Elder Princess Shroob inside it. Then she broke the Cobalt Star into pieces, while Elder Princess Shroob was still inside. While the Cobalt Star shards were spread around the world, Peach was held captive by Princess Shroob.
While Mario and Luigi teamed up with their baby selves to recover the Cobalt Shards, which they needed to save Peach according to Professor E. Gadd, Princess Shroob dressed herself up as Princess Peach. However, she was swallowed by Petey Piranha. The Mario Bros. and their younger selves defeated Petey Piranha, and Princess Shroob, disguised as Peach, was brought to the present by the brothers. E. Gadd told the fake princess to take a rest. However, while she was doing so, Bowser came and kidnapped her, believing that she was Peach. The Mario Bros. and Bowser only found out the true identity of Princess Shroob when they were all sucked into the Shroob Mother Ship in the past. During all this time, the real Peach was still in Shroob Castle.
When Mario and Luigi got to Shroob Castle, they saw Peach, but Princess Shroob interrupted their conversation at the point where Peach was going to explain why the Cobalt Star should not be completed and a battle begins. After it, Baby Bowser reunited the Cobalt Star Shards all together, making Elder Princess Shroob appear and giving her back all her power. After the battle, Peach and the others return to the present.
Mario and Luigi: Bowser's Inside StoryEdit
In the third installment of the Mario & Luigi series, the Mushroom Kingdom's citizens fall victim to a mysterious disease known as the Blorbs. Upon hearing this news, Peach proceeds to hold a very important meeting in her castle to discuss the matter at hand (along with Starlow, who explains further about the disease itself). Unfortunately, as Peach was proceeding to give said details, Bowser crashes the meeting...twice. Upon being knocked out by Mario, he was ejected by Peach (with the help of Starlow) the first time. She then gives Mario a kiss for his efforts. But Bowser managed to return to the castle the second time, but under the control of Fawful, via eating a Vacuum Shroom. As a result, Bowser inhales everyone at the meeting, including Peach.
Peach is found by Mario and Luigi in the Flab Zone of Bowser's body. Their reunion is cut short, however, when a group of Beta Kretins captures her and takes her deeper into the area. When the brothers catch up and free Peach, the Kretins attack and are subsequently defeated. After the said ordeal was over, Peach, along with Mario, Luigi, and Starlow, overhear Fawful conversing with Bowser about taking the princess from his body. After which, Peach theorizes that Fawful's real plan is to take over the Mushroom Kingdom by using an ancient artifact known as the Dark Star, hidden beneath Toad Town. She also informs them that she is the only one who can release the seal on the Dark Star's power. However, after relaying said information to the two about the impending danger, Fawful quickly captures her through the use of an odd invention that enables him to reach into Bowser's body with a hand-shaped beam and then takes her to her own castle (which was also under Fawful's control at the time).
Upon Mario, Luigi, and Bowser finally countering the sources of the "blorbs" threat, along with defeating the Dark Star itself for good, everything in the Mushroom Kingdom returns to normal and Peach is rescued at last. She also manages to regain consciousness as well (from being knocked out after Fawful removed her much earlier in the game) after being awakened by Bowser ejecting the remaining inhabitants of Bowser's body. Though Bowser attacked the Mario Bros. and still attempted to kidnap Peach directly after the Dark Star was defeated, Peach still expressed her gratitude toward Bowser for his role in saving the world by sending him a cake.