Sleep Buster deals non-elemental damage, but has a 100% chance of inflicting Sleep for one turn except to opponents with total immunity to the status. It can be found on Wakka's section of the Sphere Grid and costs 10 MP to use.
buster" means a person who breaks up something, e.g. crime busters, or something big or unusual for its kind. It derives from the verb "bust".The word "