The design of the R.O.B. Blaster is almost identical to that of the R.O.B. Sentry; however, they use vastly different fighting styles. Unlike the R.O.B. Sentry, the R.O.B. Blaster fully utilizes its beam firing eyes to attack from a distance.
There are two varieties of the R.O.B. Blaster, one which remains stationary and another that will move around, hovering with its booster rockets. The mobile version can be difficult to battle as it is the fastest member of the R.O.B. Squad and will attack from a distance. As with other members of the R.O.B. Squad, these only appear on the Isle of the Ancients.