Robot Security Guards were used to protect the Moon Bloom fields on the Dark Side of the Moon's Moon Base Alpha in the year 2186. When the Mayor's dauther Keyta played a prank on the Ghostbusters and Futura by sounding a false alarm, the five of them found themselves in trouble with the Robot Security Guards because they had tresspassed into the Moon Bloom Fields. The Robot Security Guards fire a bubbles with which to capture intruders in the Moon Bloom Fields.