Shroob-omb

A Shroob-omb is a giant purple Shroob Bob-omb used by the Support Shroobs during their battle with the Mario Bros. of past and present in Mario & Luigi: Partners in Time. The Support Shroobs would toss the Shroob-omb at the Mario Bros., engulfing the heroes in an unavoidable explosion. After the explosion, another Shroob-omb would be dropped into the battlefield by a Shroob UFO. Shroob-ombs have extremely high defense, meaning it is almost impossible to directly destroy these massive bomb creatures.

Only three Support Shroobs are needed to lift one Shroob-omb effectively, indicating the bomb is extremely light. In fact, even two Support Shroobs can lift the Shroob-omb if one of the Shroobs is destroyed, although the two remaining Support Shroobs will flash red under the stress. Ultimately, if two Support Shroobs are destroyed, the Shroob-omb will prove too heavy for the sole remaining Shroob. This last Support Shroob will be crushed and destroyed under the weight, and the Shroob-omb will roll off, either into the Mario Bros. (if the back Support Shroob remained) or Commander Shroob (if the front one remained). The middle one is random.

Trivia

 * In the Japanese and European versions of Mario & Luigi: Partners in Time, the Shroob-omb has the highest amount of HP of any enemy in the game, including the Elder Princess Shroob.
 * Although the Shroob-omb only has an average defense rating, the enemy is programmed to take 1 damage from any attack, as the Shroob-omb was not designed to be directly destroyed. However, if one does hit a Shroob-omb enough times to actually destroy it, the Support Shroobs will simply stop attacking until at least two of the Shroobs are defeated.  A Shroob-omb will then suddenly appear on-screen and either roll towards the Mario Bros. or the Commander Shroob as normally programmed, as if the Shroob-omb was never destroyed in the first place.  Additionally, if the player manages to destroy more than one Shroob-omb, the game will only award the Mario Bros. for destroying one (that is, the brothers will receive 0 Experience and 1 Coin for their efforts).
 * Bob-ulk, a species of non-Shroob Bob-omb from Paper Mario: The Thousand-Year Door, bears a resemblance to Shroob-omb.