- Not to be confused with Poison Mushroom.
Shroob mushrooms are light-purple mushrooms with white dots that appear in Mario & Luigi: Partners in Time. The Shroobs have the ability to fire purple energy bolts that turn anything they touch into Shroob mushrooms in a process; Toadiko, Toadbert, Kylie Koopa and Baby Bowser are all known to suffer this fate. People who turn into a Shroob mushroom are said to be Shroobified. These victims are all reverted when Professor E. Gadd spreads the tears of babies from the Hydrogush 4000 across the Mushroom Kingdom (in a process that Stuffwell describes as being able to "re-Toadify" them, even if not all of them are Toads). Some Shroobs are also known to turn into these purple mushrooms when defeated, like the Elder Princess Shroob. When Princess Shroob is disguised as Princess Peach, she holds a Shroob mushroom to her face. Shroob mushrooms have been rarely able to speak, such as after the Elder Princess Shroob gets defeated.
- ^ "At last! Mario has all five Cobalt Star shards! Now you can enter Peach's Castle at the past from the third floor of the present-day Peach's Castle! You must hurry and save the Shroobified Toadbert and Kylie!" — Save Album, Mario & Luigi: Partners in Time
- ^ "If we rescue Princess Peach and defeat the Shroobs... We may be able to re-Toadify these two!" — Stuffwell, Mario & Luigi: Partners in Time
|Characters||Commander Shroob • Elder Princess Shroob • Elder Shrooboid • Junior Shrooboid • Princess Shroob • Shrooboid Brat • Shrowser • Sunnycide|
|Species||Blazing Shroob • Dr. Shroob • Guardian Shroob • Intern Shroob • RC Shroober • Shroid • Shroob • Shrooba Diver • Shroob saucer • Shrooblet • Shroobsworth • Support Shroob|
|Relatives||Chain Chomp (Elder Princess Shroob) • Egg (Mario & Luigi: Partners in Time) • Shroob mushroom • Shroob Rex • Shroob-omb • Spiny Shroopa • Swiggler • Tashrooba • Yoob|
|Main||Big Dry Bowser • Black Bowser • Blockhead Bowser • Bowcien • Bowletta • Dreamy Bowser • Dry Bowser • Fury Bowser • Giant Bowser • Giga Bowser • Mega Baby Bowser • Mega Bowser • MegaDragonBowser • Meowser • Metal Bowser • Molten Bowser • Shiny RoboBowser • Shrowser|
|Other||Alarm Koopa • Black Hole Bowser • Bowser Sphinx • Bowser the Brash • Capt. Bowser • Dark Hammer Slam Bowser • Hammer Slam Bowser • Mushroom (status effect) • President Koopa • Rookie • Shroob mushroom • Tail Bowser • Wizard Bowser|