Dr. Shroob

Dr. Shroobs are yellow Shroobs that wear thick, swirly glasses in Mario & Luigi: Partners in Time. During the Shroob invasion of the Mushroom Kingdom, Dr. Shroobs were stationed in the Vim Factory, allowing them to monitor the factory's vim transformation process.

A Dr. Shroob holding up a Mushroom that he can use to grow to gigantic proportions. In battle, Dr. Shroobs attack with a ray gun (just like a regular Shroob). The energy blasts that result from this attack can be jumped over. Dr. Shroobs also like to use two items in battle: bio-engineered red Mushrooms and bio-engineered gray Mushrooms (perhaps relatives of the Poison Mushroom). The red Mushrooms will make Dr. Shroob gigantic, while gray Mushrooms will make the doctor tiny. After eating a Mushroom (regardless of color), the Dr. Shroob will then attack by charging into its opponent, inflicting heavy damage if big or minimal damage if small. Regardless of size, a Dr. Shroob's charge attack can be countered with a Hammer strike. Additionally, a Dr. Shroob will hold its Mushroom in its claws for a turn before using the item. As such, if the Shroob doctor is attacked while holding a mushroom, the doctor will drop the item.