Powermasters were a sub-group within the Transformers toyline in 1988. They were defined by the inclusion of a miniature figure which "unlocked the secret of the transformation"—in other words, the toy could not transform from vehicle mode to robot mode unless the figure was transformed into engine mode and connected to the larger figure.

Powermasters were a sub-group within the Transformers toyline in 1988. They were defined by the inclusion of a miniature figure which "unlocked the secret of the transformation"—in other words, the toy could not transform from vehicle mode to robot mode unless the figure was transformed into engine mode and connected to the larger figure.