Shrooboid Brat

The Shrooboid Brat is a blue Shroob with yellow spots that constantly holds a lollipop. The Shrooboid Brat first appeared in the Koopaseum during the events of Mario & Luigi: Partners in Time. In the game, the four Mario Bros. of past and present (Mario, Luigi, Baby Mario, and Baby Luigi) managed to stumble upon Princess Shroob's speech in the Koopaseum. The Bros. quickly dispatched her bodyguards, but before the four heroes could challenge the head Shroob herself, the Shrooboid Brat was called in to defend the princess. Apparently, the Shrooboid Brat was a champion Shroob fighter that most normal Shroobs admired. In front of a crowd of thousands of Shroobs, the four Mario brothers engaged the Shrooboid Brat in combat.

Being the crowd pleaser that he is, the Shrooboid Brat would not choose his own attacks in battle. Instead, he would let the Shroob audience choose who he should attack. During the battle, the Shrooboid Brat would turn and face the audience. The Shroob audience members would then hold up red 'M' panels (for Mario) and green 'L' panels (for Luigi) to indicate which Bro. the Brat should attack. The Mario brother with the most number of votes would be the Bro. the Shrooboid Brat would attack. To attack, the Shrooboid Brat would throw his lollipop at the chosen Mario brother (an attack that could be easily jumped over, if the Bros. knew which brother the Brat would attack). Apparently, the Shrooboid Brat had an endless supply of lollipops inside his mouth, since after he threw one, he would immediately take another lollipop out of his mouth.

Sometimes, the Shroob audience would get tricky and hold up green 'M' panels and red 'L' panels (the reverse of what they should be). In this case, the brothers had to ignore color and figure out if there were more 'M's (for Mario) or more 'L's (for Luigi). Again, the Bro. with the most votes would be the one the Shrooboid Brat attacked. Even further into the battle, the Shroobs in the audience would have multiple votes, meaning the brothers would be attacked multiple times in the order that the votes were decided.

Occasionally, the audience would give the Shrooboid Brat items to use in battle. Again, the audience would indicate which item should be used on which brother. If the Shrooboid Brat was given a Fire Flower, he would shoot a fireball at the chosen Bro. This fireball could be repelled with a Hammer strike. The audience would also send either Mushrooms or Poison Mushrooms to the Shrooboid Brat. However, he would spit out the opposite at the Mario Bros. (If given a Poison Mushroom, he'll spit a normal Mushroom at the Mario Bros., and vice versa.) Most of the time, the audience will send him multiple items, and he would spit them up in the reverse order, starting with the last one first.

Eventually, after a long and hard battle, the four Mario brothers defeated the Shrooboid Brat in combat. Unfortunately, the victory was short-lived, as Princess Shroob though ahead and sent Shroobs with hammers arrived in the arena. With their hammers, the Shroobs pounded a hole in the ground, causing the Mario brothers to fall into the Gritzy Caves, the home of Petey Piranha.

Trivia

 * Despite the fact that he's one of the Shrooboids, he doesn't have a body from Junior Shrooboid and Elder Shrooboid (large in the base and narrow on the head), but the mushroom-like body from a normal Shroob, but he does have the roar of a Shrooboid.
 * The Shrooboid Brat bears slight resemblence to a Chuboomba. Both hold lollipops and are a bit chubby.
 * This boss's name is a pun on the term "Spoiled brat", meaning that a child always throws a tantrum just because he/she wants something and doesn't get it.