Shroob

The Shroobs are a race of Poison Mushroom-like species from an unknown planet. They attacked the Mushroom Kingdom when Mario and Luigi were babies. These events take place in the game Mario & Luigi: Partners in Time. They are a purple mushroom-like species ruled by Princess Shroob and her older sister. Unlike the similar yet much more benevolent Toads, who are seemingly more human than mushroom, Shroobs seem to have retained most of their fungus ancestry.

The Shroobs forced many creatures to work and fight for them, such as Spinys, Wigglers and Bob-Ombs. The Creatures began to look like Shroobs.

After the Mario Brothers defeated the Shroob Princesses, The Koopa Troop overpowered them and took several as P.O.W.s, locking them away in cold storage.

Language
The Shroob language as it appears in the text bubbles in the game is just a bunch of nonsensical small picture text. Only one phrase, signalling attack, is repeated throughout the game. When the Shroobs talk in the game, they make gibberish sounds. However, they do sometimes use the Latin alphabet, as seen in the battle against Shrooboid Brat. When the Shrooboid Brat was about to attack, the Shroob crowd raised up signs that said either "M" or "L", signifying who to attack. The Elder Shroob Princess can also speak English. Later on, the language is shown to players using subtitles in parentheses. Whether or not this means that Mario and Luigi begin to understand the language or is just for purposes of clarification is unknown.

Technology
Shroobs use UFO's to fly them when travelling through space.

Most Shroobs carry ray guns.