Princess Shroob

""You interlopers will be consumed!""

- -Princess Shroob.

Princess Shroob is the leader of the Shroob race and the one leading the Shroob's attack on the Mushroom Kingdom. She has an elder sister known as the Elder Princess Shroob. She is the main antagonist of Mario & Luigi: Partners in Time.

Princess Shroob and Elder Princess Shroob attacked Mushroom Kingdom in the past. When Princess Peach (who was traveling back in time) trapped Elder Princess Shroob inside the Cobalt Star and broke it into shards, Princess Shroob took over as leader of the Shroobs. She launched a missile to take down Baby Bowser's Koopa cruiser in an attempt to kill him, Peach, and the Mario Bros. (both past and present).

Princess Shroob was next seen hosting a celebration about conquering the kingdom, and fed Peach to Petey Piranha. When she discovered the Mario Bros., she sent Shrooboid Brat to defeat the Mario Bros., but they defeated him. Princess Shroob and her minions sent them falling into the caves below.

Eventually, Mario, Luigi, Baby Mario, and Baby Luigi entered the Shroob Castle (Peach's castle in the past, taken over by Shroobs) and fought Princess Shroob. They defeated her, and, like previous enemies, she was destroyed in a brilliant explosion.