The equipment needed to bleed hydraulic mountain bike brakes differs slightly from model to model but regardless of which brake you're trying to bleed you will usually need the following:
The picture below shows the equipment needed to carry out a full bleed of an Avid brake system.
iRobot, Content Curator
Sacked from his previous job for operating a bike repair business during his lunch hour, iRobot now manages the FAQ section at Epic Bleed Solutions.