Staroid
Staroid can radiate destructive lightning, and fire power blasts from his arms. Staroid's top segment of the star on his back can detach and transform into a boomerang of destructive energy. He has the ability to transform into a large metal sphere. As a sphere, Staroid is practically invulnerable to any attack. Staroid was chosen to lead the Machine Empire's initial invasion due to his battle prowess. He initially overwhelmed the Zeozords until they combined into the Zeo Megazord. Staroid was destroyed by the Zeo Megazord's Saber.
"The Shooting Star"

Silo
Silo was made out of spare parts from a junkyard by the Cogs. Silo resembled the robot fighters in Rocky and his classmate Jennifer's computer game. Silo shot chains from his stomach, which wrapped around the Zeo Megazord. Giant Silo used the rockets on his back to fly, pulling the Zeo Megazord into space. Giant Silo threw the Zeo Megazord toward the sun and then returned to Earth. But much to his and King Mondo's surprise, the Rangers were able to bring the Zeo Megazord back to Earth and destroy Silo.
"Target Rangers," "A Golden Homecoming," "King for a Day, Part 1" & "Countdown to Destruction, Part 2"

Boohoo the Clown
Boohoo could can emit a high frequency sound waves extremely painful to the human ear. Boohoo's weapons are his cane that can project energy blasts, his tambourine that can project bolts of lightning, his exploding baby bottles, and his arm-mounted sword. Boohoo's head could lift itself shooting laser beams. Boohoo was dispatched from the Machine Empire to enhance the frequency and amplitude of baby Joey's voice to make the sound waves extremely destructive. He was destroyed by the Zeo Megazord.
"For Cryin' Out Loud"

People Pitcher
A robot-pitching machine monster who trapped Rocky inside of him when Rocky hit one of his balls. Tommy freed Rocky. People Picther was destroyed by Zeo Megazord. People Pitcher was among the Machine Empire's monsters to receive the Neo-Plutonium Armor, but wasn't used.
"Rangers in the Outfield" & "A Golden Homecoming"

Digster
Digster is a robot-excavation monster used by the Machine Empire that was operated by levers pulled by the small mechanoid pilot ontop of his head. Its missing was to get lava out of a volcano. He had the ability to shoot red energy blasts. He attack Kat when she bumped into their site while looking for a police dog. Digster was destroyed by the Zeo Megazord.
"Every Dog Has His Day"

Puppetman
It was a robot created to entertain kids alongside a children's entertainer, that a Cog inserted an evil cog into its back to make it evil. He hypnotized kids to misbehave. The Rangers arrived, but Puppetman used the kids as shields, knowing the Rangers wouldn't harm the children. Puppetman then escaped to a satellite station where he intended to amplify his mind-altering powers on all the kids of Angel Grove. The Rangers took him down with the new Defender Wheel. Puppetman grew, and the Zeo Megazord fought him. Billy discovered that his power came from Puppetman's nose, and told the Rangers that destroying the nose would cause Puppetman to lose his power. The Zeo Megazord's Saber cut off his nose and destroyed Pupperman. Later, Alpha 5 rebuilt the Puppetman for the next Captain Pete show.
"The Puppet Blasters"

Leaky Faucet
A robot faucet monster brought in to battle the Rangers one of a movie set. He merged with three other monsters to form the eye in front of Bucket of Bolts. He was later resurrected and used to contaminate the Earth's water supply with toxic oil. He traveled through underground pipes to get to his planned destination. Billy pointed out that this version of Leaky Faucet was more lethal than the first one. Ultimately though, he was destroyed by the Zeo Ultrazord. In his second appearance in the episode "Oily to Bed, Oily to Rise," Leaky Faucet wore a blue hat rather than a yellow one.
"Invasion of the Ranger Snatchers" & "Oily to Bed, Oily to Rise"

Pumpkin Sorcerer
A robot Jack O'Lantern monster used by the Machine Empire. Merged with three other monsters to form the eye in front of Bucket of Bolts.
"Invasion of the Ranger Snatchers"

Steambot
A shower monster used by the Machine Empire. Merged with three other monsters to form the eye in front of Bucket of Bolts. He had no formal name.
"Invasion of the Ranger Snatchers"

Traffic Kitty
A cat-like traffic sign monster used by the Machine Empire. Merged with three other monsters to form the eye in front of Bucket of Bolts. He had no formal name.
"Invasion of the Ranger Snatchers"

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