Alienizer

EPISODE 15-16:
Cannon Gladiator 1

Height: 15.5 meters
Width: 23.5 meters
Weight: 5400 tons
Meteus used this giant fighting machine to get Flora from the DekaBase. The second one would appear in episode 20.

EPISODE 15-16:
Meteus

Height: 210 cm
Weight: 114 kg
He wanted a little girl Flora but she was safe in the possession of the Dekaranger. He tried to bring forth a monster Gigas from under the ground and was defeated by the DekaBaseRobo.

EPISODE 17:
Iaru

Height: 202 cm
Weight: 85 kg
His crime was medication violation and homicide. He disguised himself as a human restaurant patron. He becomes giant.

EPISODE 18:
Big Drawer 1

Height: 82 meters
Width: 62 meters
Weight: 8380 tons
According to the Toei site, it sort of resembles the Yasaka tower, a historical symbol of Kyoto. The next model will appear in episode 44.

EPISODE 19:
Jinche

Height: 213 cm
Weight: 90 kg
Jinche's crimes were burglary, building destruction and wanted in seven planets. It would replace souls. He bodyswitched with Hoji. He took over DekaBaseRobo for a brief period.

EPISODE 19:
Shinobi Shadow 2

Height: 52 m
Width: 23 m
Wingspan: 46 m
Weight: 6500 tons
Speed: Mach 1.2
The last one appeared in episode 10.

EPISODE 20:
Baizugoa

Height: 5.8 cm
Weight: 22 g
His crimes include destroying planets, rioting and attempted destruction. He sets up a bomb.

EPISODE 20:
Cannon Gladiator 2

Height: 51.5 M
Width: 23.5 M
Weight: 5400 tons
The last one appeared in episode 16 and the next one in episode 31.

Three Hell's Siblings (Hell's three brothers)
They arrive in episode 21 and are from the River Shear Star and are wanted on the Planet 79.

EPISODE 21-22:
Blitz 1

Height: 221cm to 55m
Weight: 203kg to 4400t
His crime is murder and plundering. He is the middle child strongest and hungry. He becomes giant in episode 22 ending in his deletion. He is the second that has ever become giant.
EPISODE 21-23:
Sakyubas (Sucubus)

Height: 172 cm
Weight: 48 kg
She wanted to eat people and she wanted to keep Jasmine as her pet. Her crimes are marauding and eating people of course. For those who don't know, she was rumored to be a Purple Ranger which was incorrect.

EPISODE 21-23:
Blitz 2

Height: 230cm
Weight: 104 kg
He's the eldest brother, he and his siblings share the same crimes.

EPISODE 21, 23, & 28:
Godunder

Height: 54.3 m
Width: 36.8 m
Weight: 5500 tons
Speed: 300 km/hr
He is not a mass-produced mecha, one of its kind, the second solo model. Used by the trio. It also appears in episode 28.