A shroom is a weak enemy which usually uses a weak melee attack. This usually causes little damage and can be easily avoided. A shroom can be stunned by rolling over them.
Shrooms are not dangerous whatsoever, unless in large quantities with equipped weapons. Shrooms are most commonly found with throwables such as a throwing spike, usually 1 or 4 of them. Shrooms will drop tickled mushrooms as loot, and these can add up to a good amount of Volts if Shrooms are encountered in high quantities.